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Mathematics Questions and Answers May 30, 2023

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Problem 3. We have seen the Bonferroni corrections for the simultaneous confidence intervals a couple of times but we never explained why that works. Now let's take a look. (1) Consider two events A and B. Prove that P(An B) 2 P(A) + P(B) - 1. Demonstrate using a Venn diagram will suffice. (2) Consider m events Al, ..., Am. Show that the
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----------------------- Question 6 (15 marks) Marks a. A certain brand of milk powder is sold in packets with a mean weight of 2.5 kg. The brand has received complaints from customers that the weight is now less than 2.5 kg. As a result, the company randomly selects a sample of 60 packets and finds an average weight of 2.48 kg, with a sample
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On average, you receive 3 junk e-mails every 6 hours. Assume that the number of pieces of junk mail you receive each day follows the Poisson distribution. a.What is the expected number of junk e-mails in one day? b.What is the probability of receiving exactly two junk e-mails in a six-hours interval? c.What is the probability of receiving less

Question 17 Suppose the age that children learn to walk is normally distributed with mean 13 months and standard deviation 2.2 month. 33 randomly selected people were asked what age they learned to walk. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N b. What is the distribution of I? I - N c. What is
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Question 5 To compute a student's Grade Point Average (GPA) for a term, the student's grades for each course are weighted by the number of credits for the course. Suppose a student had these grades: 3.8 in a 5 credit Math course 2.3 in a 2 credit Music course 2.7 in a 4 credit Chemistry course 3.1 in a 4 credit Journalism course What is the
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Use the normal distribution of SAT critical reading scores for which the mean is 505 and the standard deviation is 122. Assume the variable x is normally distributed. (a) What percent of the SAT verbal scores are less than 625? (b) If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 525

Lab Insight Apply the same steps in Lab 11to the Lab 11 Data xlsx data set with two modifications. The same scenarios exist as before, with labor costing either $13/lawn or $25/lawn Assume that your mowing business will mow 350 lawns per month rather than 200 lawns per month. Alse assume that the cost for advertising increases from $50 to $300 per
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Question 14 A special deck of cards has 5 red cards, and 4 purple cards. The red cards are numbered 1, 2, 3, 4, and 5. The purple cards are numbered 1, 2, 3, and 4. The cards are well shuffled and you randomly draw one card. R = card drawn is red E = card drawn is even-numbered a. How many elements are there in the sample space? b. P(E) = Round to
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A survey finds that a shopper spends, on average, 35 minutes in a store with a standard deviation of 8.3 minutes. Assume a normal distribution. i. Find the probability that a customer spends less than 28 minutes in a store. [2] i i. Find the probability that a customer spends more than 41 minutes in a store. [2] iii. If 10 customers are randomly

A standard deck of card contains 52 cards. There are 13 cards in each of 4 suits (hearts , spades , diamonds , and clubs ). Within a suit, the 13 cards each have a different rank. In ascending order, these ranks are 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King, Ace. Suppose you are playing a four-player card game using two regular decks of cards.

A new car manufacturing company has emerged and has claimed that its new hybrid car, the Pusho, gets a better gas mileage than the highest ranked Toyota Prius. Consumer Reports Magazine decides to test this claim at a 5% level of significance. Consumer Reports randomly selects 10 of each type of car, calculates the miles per gallon for each car in

Label Number - - - Female Female _-_ What does your sample reveal about Class rank and gender? Answer in complete sentence[5)
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EC203 Economic Statistics Problem Scenario Assignment (10%) Due date: Monday 27 May 2024, 11pm (Fiji Time) The Scenario: A female bank office manager, in a major bank in Vanuatu, believes that the average amount of time spent by her office support staff reading and responding to bank enquiries from customers' emails exceeds 25 minutes per day. To
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Please help A political party wants to know the reaction of voters to a debate between the candidates. The day after the debate, the party's polling staff calls 1,200 randomly selected phone numbers. If a registered voter answers the phone or is available to come to the phone, that registered voter is asked whom he or she intends to vote for and
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In a box of floppy disks, 90% will work. If a sample of 10 floppy disks is selected at random: i. What is the probability that 7 of them will work? [1] ii. What is the probability that 2 of them will not work? [1] iii. Compute the expected number of the disks that will work from the sample. [1] iv. Compute the standard deviation for the number of

Consider an independent and identically distributed sample of n observations, X1, . . . , Xn , whose probability function is: fX(x) = m x x (1 ) mx , x = 0, 1, 2, . . . m, where 0 < < 1. In answering the following questions, you may assume the knowledge that mean and variance of this distribution are m and m(1 ) respectively. (a) Write down the

Need help with practice questions 13. A new species of sea crab has been discovered, and an experiment conducted to determine whether or not the animal can regulate its temperature. That the animal can maintain a body temperature different from the surroundings would be considered evidence of this regulating capability. Ten of these sea crabs were
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At a store the checkout timeX Xin minutes has the pdf: If f(x)=1.1e^(-1.1x) if 0x < Find the following: a) the moment generating function MX(t)= ? fort < ? t

Problem Set 2: The independent-samples t test Research Scenario: A forensic psychologist has developed a new program that teaches empathy and positive social skills to youth offenders who are incarcerated for a violent offense. She wants to know whether this new treatment is more effective in increasing empathy than the standard treatment that

RQ: DO SMOKERS HAVE LIGHTER BABIES? Box plot comparison: Compare the data provided in 2 different ways (FEMALE SMOKERS VS NON-SMOKERS & THE RELAITON OF BABY's WEIGHT) Find mean and quartiles. Find IQR and Standard Deviation. Use Excel, Numbers or your GDC. Birthweight reduced data set This dataset contains information on new born babies and their
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In a research study, a power analysis was conducted to determine the sample size required to detect a significant effect. The power analysis showed that a sample size of 50 was needed to achieve 80% power. If the researcher decides to reduce the sample size to 30, what will happen to the power of the study? a. Power will decrease b. Power will
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please help. Answer questions on this page based upon this data. A medical researcher studied the relationship between two variables: a person's current age ( x ) and the expected number of years remaining ( y ). The following data summary values are given: \f
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Ice cream sales are linked with homicide rates. What kind of claim is this? A) Association claim B) Casual claim C) There is not enough information to tell what kind of claim this is. D) Frequency claim Question 6 (0.4 points) ) Listen Which of the following is an example of a variable measured on a nominal/categorical scale? A) favorite ice cream

Suppose you obtain a random sample from a Poisson distribution with meanthat is(3,4,5,7,2,3,4,4,6,6). a)Find the 95 percent Wald confidence interval for. b)Using the Wald test statistic and the data from (2), find the p-value for testingH0:= 3versusH1: >3. c)Find the p-value of an exact test for the same hypotheses. Hint: IfX1,X2,...Xnis a random

Aspinning wheel is marked with numbers from 1 to 50. The odd numbers are red, and the even are black. When spun, all outcomes are equally likely. What is the probability of the spinner landing on the number 20, and then the spinner landing on an odd number?

The length of a certain kind of Colorado brook trout is normally distributed with a mean of 13.3 inches and a standard deviation of 1.7 inches. What minimum size limit should the Department of Natural Resources set if it wishes to allow people to keep 78 percent of the trout they catch? (Round your answer to 2 decimal places.) Minimum size

A "small" effect measure result suggests The sample size is more responsible for the null hypothesis rejection The sample size is more responsible for not rejecting the null hypothesis The variable interaction is more responsible for the null hypothesis rejection The variable interaction is more responsible for not rejecting the null hypothesis

A fair die is rolled 5 times, and the outcome of "1 spot" or "other" (meaning NOT a 1) is recorded each time. How many "1" "other" sequences are possible in these 5 rolls? List the values that this variable "number of 1 spots thrown" can assign. List the probabilities for each of these values.

A medical researcher wishes to estimate the mean systolic blood pressure of heart surgery patients the day following surgery. She desires a margin of error of 2.1 mmHg. Past studies suggest that a population standard deviation of 39 mmHg is reasonable. Estimate the minimum sample size needed to estimate the population mean with the stated

Using the predictor that total sales for this year will be ten percent higher than sales were for last year, what is the forecast of total sales for this year ? (A) 8.0 (B) 80.0 (C) 88.0 (D) 90.0 (E) 100 B$

I found this problem on this site. Wondering for assistance with this problem with explanation. \f
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The time a student sleeps per night has a distribution with mean 5.9 hours and a standard deviation of 0.4 hours. Find the probability that average sleeping time for a randomly selected sample of 48 students is more than 6 hours per night.

The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) below. 25 34 200 Assume the population is normally distributed. 1.9 0.8 4.0 22 14 38 0.1 241 33 (a) Find the sample mean. x =|2.37| (Round to two decimal places as needed.) (b) Find the sample standard deviation. &=
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According to behavioral decision research, choices involving statements about gains: Group of answer choices Tend to produce risk-averse responses Tend to produce risk-seeking responses Tend to produce risk-neutral responses Tend to produce less accurate responses than those involving losses

What is a post-hoc test and why it is necessary when rejecting the null hypothesis with an analysis of variance (ANOVA) statistical test? Describe what a post hoc test detects. Explain an experiment in which you as a researcher would run a post hoc test. Why?

Read the Research Article: On The Pen is Mightier than the Keyboard: Advantages of Longhand Over Laptop Note Taking By Pam A. Mueller (Defend or explain or provide evidences of the relevant chapter content for your answers for each of the question) 4. Are there any threats to internal validity that seem plausible?

A random variable is normally distributed.It has a mean of 245 and a standard deviation of 21. a.)If you take a sample of size 10, can you say what the shape of the distribution for the sample mean is?Why? b.)For a sample of size 10, state the mean of the sample mean and the standard deviation of the sample mean. c.)For a sample of size 10, find

the time to complete construction project is normally distributed with a mean of 60 weeks and a standard deviation of 4 weeks. a) what is the probability the project will be finished in 62 weeks or less? b) what is the probability the project will be finished in 66 weeks or less? c)what is the probability the project will take longer than 65

The training manager of a company that assembles and exports pool pumps wants to know if there is a link between the number of hours spent by assembly workers in training and their productivity on the job. A random sample of 10 assembly workers was selected and their performances evaluated. Training Hours 20 36 20 38 40 33 32 28 40 24 Output 40 70

Measles is a serious disease spread by airborne transmission.The causative agent is the measles virus.A measles outbreak occurred in Texas in 1970.Between June 28, 1970 and January 29, 1971, there were 493 cases of measles among children in a population of 11,185.4,810 of the children were unvaccinated, and out of those unvaccinated children, 466

I would like an explanation of how to solve this please- A jar contains 12 red marbles numbered 1 to 12 and 8 blue marbles numbered 1 to 8. A marble is drawn at random from the jar. Find the probability of the given event, please show your answers as reduced fractions . (a) The marble is red. P(red)= (b) The marble is odd-numbered. P(odd)= (c) The

To answer these next questions,you will need to open demo.savin SPSS. First, run a frequency on the variable that represents mother's highest level of education. How many cases in your data file said that they "don't know" their mother's highest level of education?

Why do we say a sampling distribution is a theoretical null model? Why couldn't we build one every time we wanted to know the likelihood of something? Remember, the sampling distribution is the probability distribution of the values taken by the statistic on all possible samples of the same size from the same population. How feasible is it for us

Give 3 ways (or examples of how) that the use of regression analysis in a business workplace is an act of good stewardship. Additionally, answer the question: how will practicing good stewardship help you to be more successful and/or find more satisfaction in your workplace?

D0 a reflection on your past experience when you has to read a data visualization but failed to do so. Why did you fail? What do you think can help you (and other people) better to understand data visualization at any given moment and place?

Show Intro/ Instruct You are conducting a study to see if the probability of a true negative on a test for a certain cancer is significantly less than 0.1. You use a significance level of a = 0.01. Ho :p = 0.1 H1 :p
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answer with explanation Let Q = [0, 1] and .71 be the a algebra generated by C = { I :I C Q is an interval} Prove that the a- algebra .71 matches that of bore] in [0, l]
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Suppose you have collected the following sample data from twenty-six randomly selected Dallas area families regarding their Weekly Expenditures on Video Rentals and Weekly Expenditures on Dining Out: Video Rentals Dining Out 1 $12 $28 2 $12 $27 3 $6 $32 4 $13 $32 5 $7 $25 6 $10 $24 7 $8 $27 8 $4 $20 9 $4 $32 10 $13 $35 11 $5 $30 12 $9 $22 13 $12

Researchers examined forecasters' interest rate predictions for 34 quarters to see whether the predictions corresponded to what actually happened. The 2 x 2 contingency table below shows the frequencies of actual and predicted interest rate movements. Interest Rate Forecast Accuracy Actual Change Decline Rise Row Forecast Change

You are concerned that nausea may be a side effect of Tamiflu, but you cannot just give Tamiflu to patients with the flu and say that nausea is a side effect if people become nauseous. This is because nausea is common for people who have the flu. From past studies you know that about 33% of people who get the flu experience nausea. You collected

Note: focused this - Please send me answer in type form strictly prohibited handwritten solution don't use chatgpt or copied content show your own work with step by step explanation do not miss any step, mention formula and concept.

Discussion Board Topic: Grading on the Curve - Some instructors believe that student grades should end up being 'normally distributed'. For example, A's are given to those students with a z score greater than or equal to 2 (this is only about 2% of students), B's for a z score between +1 and +2 (about 14% of students) and C's given for z scores

A bag contains 9 red marbles, 9 white marbles, and 8 blue marbles. You draw 3 marbles out at random, without replacement. What is the probability that all the marbles are red? The probability that all the marbles are red is: What is the probability that exactly two of the marbles are red? The probability that exactly two of the marbles are red is:

A sample of 278 adults is selected. The adults are classified according to voter registration status ("registered" or "not registered"). They are also classified according to preferred source of current events information ("television\
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A local business sold 3 items listed below. What is the average price of an item sold considering quantity? 60 notepads at $3.50 each 25 folders at $0.75 each 72 calculators at $9.00 each $4.42 $0.33 $1.86 $5.58

Critical values for quick reference during this activity. Confidence leve lCritical value 0.90 z=1.645 0.95 z=1.960 0.99 z=2.576 In a poll of 1000 randomly selected voters in a local election, 283 voters were against fire department bond measures. What is the sample proportion p^? What is the margin of error m for the 99% confidence level?

Suppose you roll a fair sided die (in the shape of a cube, with sides having numbers 1, 2, 3, 4, 5, 6 on them, as usual] and a fair 4sided die (in the shape of a regular tetrahedron, with sides having numbers 1, 2, 3, 4 on them}. Let A be the event that you roll a 1, 2, or 3 on the Eisided die, and let B be the event that you roll a 1 or 2 on the
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1.In a study designed to gauge married women's participation in the workplace today, the data provided in the file HW_03 were obtained from a sample of 350 randomly selected married women. Consider a woman selected at random from this sample in answering following questions. a.What is the probability that this woman has a job outside the home?

You want to use a two-tailed one-sample t-test and = .01. You have 50 people in your study. You find a calculated t of -2.75. What should your conclusion be? a. retain the null hypothesis b. reject the null hypothesis

company has to decide whether or not to continue with plans to run a conference next June in a hotel. If it decides to continue then it will either make a profit of $1 million or lose $0.8 million. It if decides to cancel it will either lose $0.2 million in compensation payments to participants or, if it is also sued by the hotel, lose a total of

If you are designing a new test and want it to detect a pathogen as effectively as possible, even if only small quantities of the pathogen are present, then you are designing a test with __________. ANSWER Unselected high specificity and high likelihood of a false-negative result Unselected high sensitivity and high likelihood of a false-negative

On the leeward side of the island of Oahu, in a small village, about87%of the residents are of Hawaiian ancestry. Let n = 1, 2, 3, ... represent the number of people you must meet until you encounter the first person of Hawaiian ancestry in the village. (a)Write out a formula for the probability distribution of the random variable n . (Enter a

I want to anaylzethe "florida"data in the "alr4" package of R by using the mean function where Buchanan is the response and Bush is a predictor. I 've noticed outliers in this model and I want to consider making transformations to the data and see if these outliers still exist? Could this tell me about behavior in the 2000 presidential election.

HW_10 1.HW_10 uses question 12 on page 846 of our textbook. I also copy and paste the problem here. In August of the current year, a car dealer is trying to determine how many cars of the next model year to order. Each car ordered in August costs $20,000. The demand for the dealer's next year models has the probability distribution shown in the

Please give me the answer, thank you so much! Question 1 : How Many? Recommended HW is one resource that students may not fully take advantage of. A good goal would be to try out some of the recommended HW (these do have solutions and explanations) first and then you may be able to work the required questions through on your own more readily. So,
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Your instructor will provide you with a data file that includes data on five variables: SALES represents the number of sales made this week. CALLS represents the number of sales calls made this week. TIME represents the average time per call this week. YEARS represents years of experience in the call center. TYPE represents the type of training

The following statement provides two values. For the pair of values, use a percentage to express their relative change or difference. Use the second given value as the reference value. Also, write a statement describing the result. The population for a particular region is now 324 comma 851 comma 701, and in 1999 it was 288 comma 185 comma 439.

What is the expected outcome for rolling a six-sided die using your discrete probability distribution table above? x 1 2 3 4 5 6 P(x) 3(25) 2(25) 6(25) 5(25) 1(25) 2(25)

(14) 5. To improve telephone service, an executive of a certain company wants to estimate the average number of phone calls placed by each secre- tary. The company has 12 departments, each employing a certain number of secretaries. Since in this company the departments are formed based on the funectional areas of the departments, it is expected
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Following are the published weights (in pounds) of all of the team members of the Atlanta Falcons from a previous year. 174, 177, 178, 184, 185, 185, 185, 185, 188, 190, 200, 205, 205, 206, 210, 210, 210, 212, 212, 215, 215, 220, 223, 228, 230, 232, 241, 241, 242, 245, 247, 250, 250, 259, 260, 260, 265, 265, 270, 272, 273, 275, 276, 278, 280, 280,

4) Listen A researcher is interested in studying thinking and risk taking. He predicts that as thinking decreases, risk taking will increase. He collects data from 20 people on both variables and computes a Pearson correlation of +.63. What statistical decision should he make

ISyE 6664, Homework 2 Due September 11, Wednesday 1. A machine can be in four different states: new, good, bad, and dead. When the machine is in new condition, there is a profit of $10,000. When the machine is in good condition, there is a profit of $5,000. When the machine is in bad condition, there is a cost of $1,000. When the machine is dead,
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Hello, I would like to try and get guidance on the R coding output to make my own interpretations on the following example: I want to analyze the MinnLand data in the alr4 package.For now, I will analyze it without using the region or financing variables included in the data . Using all other variables, I am trying to us "R" to fit a model to

For the givenevent, state whether the difference between what occurred and what you would have expected by chance is statistically significant or not statistically significant. Assume that a study of 500 randomly selected school bus routes showed that 484 of the buses arrived on time. One of thebuses, however, was late.

I'm conducting research for startup management. I'm conducting quantitative analysis on data collected with a 7-points Likert scale survey. Although the respondents were only 30, I started the analysis due to the small audience and not an attempt to make general conclusions. I have components with only two variables, and some components have four

Let's Make a Deal! - Imagine that you're on a game show, and you're given the choice of a mystery prize behind one of 3 doors: Behind one door is a car; behind the other two doors are goats. You pick a door, say No. 1, and the host, who knows what's behind the doors, opens another door, say No. 3, which has a goat. He then says to you, "Do you

You are hired by a car manufacturer to determine what factors might increase sales of their energy-efficient car. The manufacturer modifies the original version of the car so that it either rides more smoothly or has a more luxurious interior. You then ask 10 adults who come to the showroom looking to buy a new car to test drive each and then rate

1 Question 1 Anton, Meghana, and Chris all teach sections on Tuesdays. On any given Tuesday, the probability that Anton is on time to teach is 70%, the proba- bility that Meghana is on time is 90%, and the probability that Chris is on time is 50%. Find or bound the probability that at least one of the 3 GSIs are late
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A random sample of 150 students was surveyed to determine participants' favorite sport. The results are shown in the table.How many degrees of freedom exist for a 2 test on these data? Question 2 options: Two Four Five Seven 10

A sample of 244 adults is selected. The adults are classified according to voter registration status ("registered" or "not registered"). They are also classified wom "o according to preferred source of current events information ("television\
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Looking back at the start of the COVID-19 pandemic, Table 2 below presents population data extracted from Australian Department of Health's Coronavirus (Covid-19) surveillanceLinks to an external site. . Use the summary statisticsprovided in the infographics below (at the end of the instructions) to complete the table and answer the following
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A large department store is curious about what sections of the store make the most sales. The manager has data from ten years prior that show 30% of sales come from Clothing, 25% Home Appliances, 18% Housewares, 13% Cosmetics, 12% Jewelry, and 2% Other. In a random sample of 550 current sales, 188 came from Clothing, 153 Home Appliances, 83

Question 6: Let X be the time (in minutes) per day for which electrical equipment is used at maximum load. A density function is given below \f
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Help me solve this ASAP A frequency table of grades has five classes (A, B, C, D, F) with frequencies of 2, 13, 18, 7, and 2 , respectively. Using percentages, what are the relative frequencies of the five classes? Complete the table. Grade Frequency Relative frequency A 2 4.76 % B 13 30.95% C 18 42.86% D 7 9.52% F 2 4.76% (Round to two decimal
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In a study of the effects of exercise on blood pressure, researchers predict simply that there will be a difference on blood pressure between the exercise and no-exercise groups. The researchers are using a ______ hypothesis. In a study of the effects of exercise on blood pressure, researchers predict simply that there will be a difference on

I would like help responding to each Discussion Question Responses. Elaborating/ Opening a discussion on the statement they made regarding the question below: * Question: When is the analysis of variance (ANOVA) statistical test necessary instead of a t test? Compare an ANOVA with a t test and provide an example of each. DQ 1: Danny When there are

A researcher uses analysis of variance to test for mean differences among three different treatments with a sample of n = 12 in each treatment. The F-ratio for this analysis would have what df values?

1. Suppose that A, B, and C are sets such that | A | = 20, [ B) = 27, | A n B| = 6, and |AU BUC = 50. What are the largest and smallest possible values of | C|
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Use Venn diagrams and set concepts to solve application A coffee shop collected the following information regarding purchases from 120 of its customers. 66 purchased coffee. 44 purchased donuts. 24 purchased coffee and donuts. a) Of thosesurveyed, how many purchased onlycoffee? b) Of thosesurveyed, how many purchased onlydonuts? c) Of

112. Frank owns an apple farm and plans to spend 4 hours today picking apples. The number of apples he can pick per hour depends on the total number of hours he spends working in either tr east orchard or the west orchard in the manner shown in the table below. Hours in Number of Hours in Number of East Apples Per West Apples Per How should Frank
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During the 2018-2019 College Soccer season the Humber Room Restaurant spearheaded a nutrition program for the Humber Hawks Womans Soccer team. After consulting with several faculty members in the Food and Nutrition Management program, the Humber Room Restaurant put together a "High Performance Meal" that fulfilled the nutritional needs of the
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Do univariate statistics have a real purpose, and if so what is it? What do bivariate statistics add to the equation that univariate stats do not? Is there a purpose here? Discuss multivariate analysis and how they attempt to tackle the issue of causality. Lastly, discuss the larger role of statistics in the social sciences. Do they have a role?

Calculate the central tendency (i.e., mean, median, and mode) of the2 continuous variables. You will use these variables for parts of the Final Project. Calculate the range, standard deviation, and the variance for the2 continuous variables you have chosen. Calculate the central tendency (i.e., mode or modes) for both categorical variables. Also,

Part B - Problem Solving The following data shows the number of texts/posts that people have sent in an hour. 20 76 22 52 50 22 44 52 51 70 62 99 30 83 26 25 11 22 26 82 18 31 34 72 60 76 80 25 81 86 18 88 10 a) Construct a frequency distribution table in Excel using an appropriate bin width. Create borders around your table. Paste the table into
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In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College. To see whether or not the proportions have changed, a sample of 300 students from the university was taken. Ninety of the sample students are in the Business

For part A create 6 intervals or groupings and present them in descending order.Add three more columns to the frequency table:" percentage % ," " Cumulative Frequency ,"and " Cumulative percentage% ." All percentage display must include two decimal places, practice rounding if the calculation results call for rounding. 2.32 Frequency tables,
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Here is a typical statement made by themedia: "Based on a recentstudy, pennies weigh an average of 2.5 grams with a margin of error of 0.006gram." What important and relevant piece of information is omitted from thatstatement? Is it OK to use the word"average"? Choose the correct answer below. A. The media often omit reference to the

I am interested in exploring the effects of spaced practice and massed practice (i.e., "cramming") on memory. I randomly assign 50 people to a spaced practice condition and 50 different people to a massed practice condition. Then I have them all complete a memory test with the goal of comparing the groups' scores on that test. What is the

The length of time a full length movie runs from opening to credits is normally distributed with a mean of 1.8 hours and standard deviation of 0.15 hours. Calculate the following: A random movie is between 1.8 and 1.95 hours. A movie is shorter than 1.65 hours. A movie is longer than 2.1 hours. The length of movie that is longer than 44% of the

6 cards are drawn at random from a standard deck. Find the probability that all the cards are hearts: Find the probability that all the cards are face cards: (Note: Face cards are kings, queens, and jacks.) Find the probability that all the cards are even: (Consider aces to be 1, jacks to be 11, queens to be 12, and kings to be 13)

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