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Mathematics Questions and Answers February 25, 2023

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On Feb. 10th in 2010, 5.46% of the randomly selected spots had algae. Is 5.46% a statistic or a parameter?

How would you describe the difference between a time series model and a regular regression model

There are two stacks of firewood in my backyard, stack A and stack B. For some reason, I want to estimate the difference in mean length of the pieces of wood between the two piles. I randomly sample 21 pieces from stack A which results in a sample mean length of 17.5" with a sample standard deviation of 4.4". A random sample of 23 pieces from

You want to rent an unfurnished one-bedroom apartment for next semester. You take a random sample of 10 apartments advertised in the local newspaper and obtain the following monthly rental rates (in dollars): 500, 650, 600, 505, 450, 550, 515, 495, 650, 395 Question 1. Find a 95% confidence interval for the mean monthly rentfor unfurnished

Students at a major university are complaining of a serious housing crunch. Many of the university's students, they complain, have to commute too far to school because there is not enough housing near campus. The university officials respond with the following information: the mean distance commuted to school by students is 16.2miles, and the

Please answer the following questions. For Q2 and Q4 I need to give peer reviewed references in your postings that are also considered as substantive postings which should support your statements. Do list the reference at the end of your postings. Q1: Think of a claim you have seen on television, on the Internet, or in the newspaper that you

Data analysis is the process of developing answers to questions through the examination and interpretation of data. The basic steps in the analytic process consist of identifying issues, determining the availability of suitable data, deciding on which methods are appropriate for answering the questions of interest, applying the methods and

The stereotype of indifferent black fathers is debunked because the data shows that black fathers more than all other male groups________ and_____________

Price Rooms Neighborhood 309.6 7 0 307.4 8 0 340.3 9 0 346.5 12 0 298.2 6 0 337.8 9 0 324.1 10 0 313.2 8 0 327.8 9 0 325.3 8 0 308.5 6 1 381.3 13 1 337.4 10 1 346.2 10 1 342.4 9 1 323.7 8 1 329.6 8 1 343.6 9 1 360.7 11 1 348.3 9 1

1.The United Package Service has a policy that states if a package is delivered late they will reimburse their shipping fees. They deliver packages late only 5% of the time. If a delivery personhas 7 deliveries one day, what is the probability that at most1 packageis arriving late? Round your answer to the nearest ten-thousandth. 2.A coin is being

EastBend Corporation is interested in producing and selling an innovative new Popcorn popper. The decision they face is the typical'make or buy" decision that is often faced by manufacturers. On the other hand, EastBend could produce the popcorn popper itself and subcontract different subassemblies, such as heating the element or the housing. Cost

For the situation, identify the two players and their possible choices, and construct a payoff matrix for their conflict.Andersonville has two gas stations, Ralph's Qwik-Serv and Charlie's Gas-n-Go. Both Ralph and Charlie are considering raising prices by 1, staying with their current prices, or lowering prices by 1. If they both make the same

#11 Question: Every person is weighed who enters the stadium. The average weight is calculated. What is the terminology for this finding? A Sample Statistic B Population Parameter C Inference D Rational subgroup

Prob Set 2 1. Suppose the prevalence (p=.32) of type II diabetes follows a binomial distribution in a community. Researchers want to sample 15 households from the community for a new study investigating ethnographic ties to the chronic illness. a. What is the probability of selecting 8 or more diabetics in the sample from the community? = 1-P(X <

Need help with a stats problem, normal distribution. Need the mean and standard deviation. Here's the question and all the info I am given Salesperson Commission. Suppose youre a salesperson and you receive $1,000 commission for each sale. During half of your sales calls the prospect agrees to talk with you over the phone. Of these 20% agree to

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Below is the five-number summary for 136 hikers who recently completed the John Muir Trail (JMT). The variable is the amount of time to complete the 212-mile hike from Yosemite Valley across the high Sierras to the top of Mount Whitney. Five-number summary: Minimum: 9 days Q1: 18 days Median: 21 days Q3: 28 days Maximum: 56 days If we use the 1.5

Suppose that prior to conducting a coin-flipping experiment, we suspect that the coin is fair. How many times would we have to flip the coin in order to obtain a 99% confidence interval of width of at most .18 for the probability of flipping a head? a) 205 b) 167 c) 210 d) 166 e) 204 It has been observed that some persons who suffer colitis are

determine the Fourier series expansion of the following signal; x(t)= sin(2*pi*t)+ cos(3*pi*t)

Stat 401: Applied Statistical Methods II Fall 2016 Homework #3 Due Date: October 7 (in your lab) 1. An exam has two questions. Let (X, Y) be the outcomes for a randomly selected student. X = 1 if the student answers question 1 correctly; and X = 0 if the student does not. Similarly, Y denotes the corresponding outcome for question 2. The joint pmf

M3 Group Assignment Instructions Complete the Assignment, name it as GroupXX_Assign3.xls (where XX is your Group Name), and upload and submit to the instructor through Dropbox. Do not enter anything in the spreadsheet cells that are black, labeled \"Grader\". You must complete this assignment without the assistance of persons other than the

Charmaine invested her savings in two investment funds. The amount she invested in Fund A was $ 8000 less than the amount she invested in Fund B. Fund A returned a 7 % profit and Fund B returned a 5 % profit. How much did she invest in Fund B, if the total profit from the two funds together was $ 1240 ?

Find all polar coordinates of point P where P =(1, pi/3) possible answers: a. 1, pi/3, + 2npi or (-1, pi/3 + (2n + 1 ) pi) b.1, pi/3, + (2n+1)pi) or (-1, pi/3 + 2npi) c.1, pi/3, +n pi) or (-1, pi/3, +n pi) d.1, pi/3, + 2n pi) or (-1, pi/3 + 2n pi)

A rainstorm in Portland, Oregon, has wiped out the electricity in about 7% of the households in the city. A management team in Portland has a big meeting tomorrow, and all 6 members of the team are hard at work in their separate households, preparing their presentations. What is the probability that none of them has lost electricity in his/her

"HI.-." uuv-ul.nw.ihul auuuugmuml'apuv uprmuma'm 16 Use the gwen degree of confidence and , sample data to construct a confidence interval for the popuiation proportron p. Round to three decimal palces. C) A. 0.501

In the 1980s it was generally believed that congenital abnormalities affected about 5% of the nations children. Some people believe that the increase in the number of chemicals in the environment has led to an increase in the incidence of abnormalities. A recent study examined 384 children and found that 46 of them showed signs of an abnormality.

Exam: 8.07a Module Eight Practice Test Warning There is a checkbox at the bottom of the exam form that you MUST check prior to submitting this exam. Failure to do so may cause your work to be lost. Question 1 (Multiple Choice Worth 1 points) Find the vertex, focus, directrix, and focal width of the parabola. Vertex: (0, 0); Focus: (0, 10);

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A study was conducted to 1600 individuals to determine whether any relationship exists between income and chosen wireless company. The results are presented below: Annual Income T-Mobile (T) AT&T (A) Verizon (V) Other (O) Less than 50k (L) 340 430 234 76 50k - 100k (M) 115 145 186 22 More than 100k (H) 7 18 25 2 If a Verizon subscriber is

1. True or False. If p is true, q is false, and r is false, is true.

age genotype 43 1.6 /1.6 47 1.6 /1.6 55 1.6 /1.6 57 1.6 /1.6 61 1.6 /1.6 63 1.6 /1.6 63 1.6 /1.6 69 1.6 /1.6 70 1.6 /1.6 72 1.6 /1.6 72 1.6 /1.6 75 1.6 /1.6 79 1.6 /1.6 79 1.6 /1.6 38 1.6 /0.7 43 1.6 /0.7 43 1.6 /0.7 45 1.6 /0.7 49 1.6 /0.7 53 1.6 /0.7 54 1.6 /0.7 54 1.6 /0.7 54 1.6 /0.7 59 1.6 /0.7 59 1.6 /0.7 62 1.6 /0.7 65 1.6 /0.7 65 1.6 /0.7

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the mean score of college student is 540 with a standard deviation of 50. what is the prob that the two groups of students selected at random consisting of 32 and 50 students will differ in their mean sores by more than 20 points?

Question 32:The Department of Transportation of the State of New York claimed that it takes an average of 200 minutes to travel by train from New York to Buffalo. A random sample of 40 trains was taken and the average time required to travel from New York to Buffalo was 188 minutes, with a standard deviation of 28 minutes. What is the p-value for

A catering service offers 10 appetizers, 7 main courses, and 6 dessets. A banquet chairperson is to select 9 appetizers, 6 main courses, and 4 dessets for a banquet. In how many ways can this be done?

: A new standardized test is being developed by Acme Assessment Associates of America. Preliminary administrations of this proposed test of general knowledge verify that the scores will be normally distributed with a population mean of 200 and with a population standard deviation of 25. [COMMENTS & HINTS: If it applies, please do not simply state

Give an example of two different functions that have the same domain and the samerange, but have no pairs in common.Choose the correct answer below. A. f left parenthesis x right parenthesis equals x comma g left parenthesis x right parenthesis equals 2 xf(x)=x,g(x)=2xStartRoot x EndRootx B. f left parenthesis x right parenthesis equals 2 x comma

Which of the following statements are true? A.Probabilities must be nonnegative. B.Probabilities must be negative. C.Probabilities can be any positive value. D.Probabilities can either be positive or negative.

1.A card is drawn from a standard deck of 52 playing cards. Leave answers as fractions in lowest terms and odds as a ratio in lowest terms. Find each of the following probabilities or odds: A) the probability that the card is a diamond (1 mark) B) the probability that the card is an odd-numbered card (1 mark) C)the probability that the card is a

The following is a partial printout from a Regression routine run on quarterly seasonal data with a trend in order to obtain a regression forecasting model. There were 20 consecutive quarters in the original time series. Time period 1 corresponds to a 1st quarter value. The trend variable is t, and the 3 dummy variables representing Quarters 1, 2

The regionsof a country with the six lowest rates of violent crimelast year areshown below. 1 . S o u t h ern 2 . N o r t h e a s t 3 . S o u t h w e s t 4 . N o r t h e r n 5 . S o u t h e a s t 6 . E a s t e r n Determine whether the data are qualitative or quantitative and identify the dataset's level of measurement. Are the data qualitative

PSTAT W120A, Summer 2016 Assignment 2.A Due Wednesday Aug. 10 Directions: Please write up your solutions and submit them on GauchoSpace by the end of the day on Wednesday. We prefer the submission to be single pdf file if possible. Bonus points will be awarded for organization and neatness. Lesson 5 Binomial Experiments 1. A complicated mechanical

1. A sample of 49 observations is taken from a normal population with a standard deviation of 10. The sample mean is 55. Determine the 99% confidence interval for the population mean. (Round your answers to 2 decimal places.) Confidence interval for the population mean is and . A research firm conducted a survey to determine the mean amount steady

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blem r 2 2 Select the correct y n x y ' NO) = 1 numerically for y(0.2) using h = 0.1 answer. 2 an 1.0 ' b. 1.001 c. 1.01 d. 1.02 e. 1.002 I - 2 6. The solution of the differential equatmn y + y/ x - y IS Select the correct

please help me with this. I don't understand what my professor is asking.... my original question and answer: 15t 2 + 2t+5 = 3t(t 2 +1). Let's call this is equation (1) We'll have: (1) 15t 2 + 2t+ 5 = 3t 3 + 3t 15t 2 + 2t+ 5 - 3t 3 - 3t = 0 -3t 3 + 15t 2 - t + 5 = 0 (t-5) (-3t 2 -1) = 0 t -5 = 0 or -3t 2 -1 =0 t=5 or 3t 2 +1 = 0 (divide by -1)

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R language problem use R to 1. Write a function that takes a number year and returns a logical value which is either TRUE, if the year was or will be a leap year, or FALSE if not. The rule for determining leap years is that one of the following conditions must hold: 1) the year is divisible by 4 but not divisible by 100, or 2) the year is

5. At a school pep rally, a group of sophomore students organized a free raffle for prizes. They claim that they put the names of all of the students in the school in the basket and that they randomly drew 36 names out of this basket. Of the prize winners, 6 were freshmen, 14 were sophomores, 9 were juniors, and 7 were seniors. The results do not

12. A group with 11 members elects a president, a vice president, and a secretary. No member can hold more than one position. In this 11 member group, 6 are girls and 5 are boys. How many ways are there to select the group officers if the president is a girl and the vice president is a boy?

(5 pts) A bag contains 10 white, 12 blue, 13 red, 7 yellow, and 8 green wooden balls. A ball is selected from the bag and kept. You then draw a second ball and keep it also. What is the probability of selecting one white ball and one blue ball? Leave the answer in fractional form.(5 pts) A student scores 62 on a geography test and 285 on a

Suppose that we wish to establish 3-letter passwords, requiring that no letter be repeated in a password. How are possible? ( There are 26 letter to choose from.)

Sorry its my first time to use this, i want all the five questions answered i am behind time schedule. How quick can i get this?

Previously, an organization reported that teenagers spent an average of4.5 hours per week on the phone. The organization thinks that the currentmean is higher. To test the claim,fifteen randomly chosen teenagers were asked how many hours per week they spend on the phone. The sample mean was 4.75 hours with a sample standard deviation of 2.0.

In 2002, 21 states in the U.S. required all motorcycle riders to wear a helmet (i.e., universal helmet law) while 29 states required only young riders to wear one (i.e., partial helmet law). For this year, the average motorcyclist fatality rate (fatalities per 1 million population) for universal law states was 9.93 with a standard deviation of

Question: If the linear assumption in regression is violated? A) No particular problem results. B) Predictions of Y can still be made, but the coefficient of determination is invalid. C) The formulas in regression analysis do not apply. D) The slope of the sample line must be adjusted upward before it can be used. E) None of the above.

Heights were measured for a random sample of plants grown while being treated with a particular nutrient. The sample mean and sample standard deviation of those height measurements were centimeters and centimeters, respectively. Assume that the population of heights of treated plants is normally distributed with mean the sample, can it be

Data concerning the time between failures (in hours of operation) for a computer printer have been recorded, and the first quartile equals 45 hours, the second quartile equals 57 hours, and the third quartile equals 77 hours. From the following observations within the data set, which one is most likely an outlier?

The number of houses that can be served by a water pipe varies directly as the square of the diameter of the pipe. A water pipe that has a10-centimeter diameter can supply 40houses. a. How many houses can be served by a water pipe that has a 5050-centimeterdiameter? b. What size of water pipe is needed for a new subdivision of 2560houses?

Solve the following problems. 1. The ABC distribution center sold the following number for pallets during the last two weeks. Day 1 2 3 4 5 6 7 Demand 107 121 117 111 94 99 104 Day 8 9 10 11 12 13 14 Demand 116 123 129 92 95 104 102 Develop a spreadsheet to do the following task: Compare the accuracy of the forecasts, for days 15 to 28, using

A student applies for a summer internship at 3 different companies. Given this student's previous work experience and grades, there is a 30% chance of getting an internship offer at any company. Getting an offer from one company does not affect getting an offer from another company. What is the probability this student will receive 2 or more

Chapter 11 Assignment Name Description of the Data: Results of a randomized comparative experiment to investigate the effect of calcium on blood pressure in African-American men. A treatment group of 10 men received a calcium supplement for 12 weeks, and a control group of 11 men received a placebo during the same period. All subjects had their

You are working for a government department and your boss, Jane, has asked you to calculate some results on weekly household income across the state, including a 95% confidence interval for the mean weekly household income that she needs to include in a report. She also says that she is not sure exactly what a 95% confidence interval means and

The following table shows incomplete data for contact lens prediction. Recommended Lenses is the target variable. A decision tree is built to make prediction. Please write the complete rule sets based on the decision tree. (20 points) Contact Lens Prediction Age Spectacle Astigmatism Prescription Tear Production Rate Recommended Lenses young myope

The following data give the percentage of women working in five companies in the retail and trade industry. The percentage of management jobs held by women in each company is also shown. % Working 67 45 73 54 61 % Mngmt 49 21 65 47 33 a) Develop a scatter diagram for these data with the percentage of women working in the company as the independent

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Suppose you run a simulation model several times with different order quantities. What can we infer about the quantity that maximizes the output, the companys profit?

Consider a savings plan with an initial deposit of $5500, an annual interest rate 5.5% compounded monthly and a monthly deposit of $160. Please note that in this assignment you should round the interest rate tono less than5 or 6 decimal places. Rounding to less than 5 or 6 decimal places will give incorrect answers. When entering the interest rate

Hi Sirs, Madams, I am really looking for a favor on my assignment relate to hypothesis test, as follow - Help me on providing an example of research topic which use statistics in its analysis, and please develop the hypothesis to be tested. - Briefly analyse why the hypothesis developed is adequate to help theexercise achieving its aims. Thanks

Suppose you randomly selected a customer. How likely is it that the customer will purchase a) Brand A b) Brand b Provide 95% interval estimates for each of the above. Show the confidence intervals graphically and interpret your results

Sixty percent of Americans read their employment construct, including the fine print (Snapshots, usatoday.com, January 20, 2004). Assume that the number of employed who read every word of their contract can be modelled using the binomial distributions. For a group of five employees, what is the probability that:- All five have read every word of

Replies: After you have made your post, you will be able to see your classmates' posts. Find 2 classmates who disagreed with at least some part of at least 1 of your answers to questions 4 and 5 and explain why your answers are correct. If after reading some of your classmates' posts, you change your mind about the right answers for questions 4

The first step in analyzing data sets is to find some summary descriptive statistics for key variables. For salary, compa, age, performance rating, and service; find the mean, standard deviation, and range for 3 groups: overall sample, Females, and Males. You can use either the Data Analysis Descriptive Statistics tool or the Fx and functions.

M AT H 1 2 0 Differential and Integral Calculus Fa l l 2 0 1 6 - P r o b l e m S e t # 2 Due Wednesday, September 28 Write your name and student number very clearly in the upper right hand corner of your front sheet and staple your sheets if necessary. You are encouraged to collaborate with others when working on your homework assignments, but you

$FL2@(#) IBM SPSS STATISTICS DATA FILE 64-bit MS Windows 20.0.0 ##########################Y@18 Jun 1606:06:05 ###########################UCQIQ ####UCQ intelligence scores ########################ACADEMIC ###Academic Achievement Percentile ############################################################## ################################

Determine whether the following statement is true or false. If it isfalse, rewrite it as a true statement. If two events areindependent,P(A|B)equals=P(B).

Suppose we have to randomly select 5 applicants from a pool of 24 applicants, 16 men, and 8 women. The probability of getting 3 women in this sample is ___.

An airline is deciding how many reservations to accept for a new flight from Indianapolis to Chicago. The plane has a capacity of 200 seats. Because only 90 percent of passengers typically show up for this flight, they need to determine how many tickets to sell. The plane has 200 seats available. An empty seat costs the airline $200 per seat.

MATH 107 QUIZ 5 July, 2016 NAME: _______________________________ Instructor: S. Sands I have completed this assignment myself, working independently and not consulting anyone except the instructor. INSTRUCTIONS The quiz is worth 100 points, and there is an extra credit opportunity at the end. There are 10 problems. This quiz is open book and open

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M/M/s Queueing Calculations 1200% Basic Parameters Arrival Rate Service Rate Number of Servers Time Unit per hour Number in system Probability per hour 0 #NAME? 1 #NAME? hour 2 #NAME? 3 #NAME? Basic Performance Measures 4 #NAME? Utilization ### 5 #NAME? P(0), probability that the system ### 6 #NAME? is empty Lq, expected number in queue ### 7

True or False: We want to compare two population variances. As long as the sample sizes are large (n 1 >30 and n 2 >30), we do not have to assume the observations follow a normal distribution.

Let x be a continuous random variable that follows a normal distribution with a mean of 200 and a standard deviation of 25. Find the value of x so that the area under the normal curve to the right of x is .8051

If A and B are independent events, show the following (a) A and Bc are independent (b) Ac and Bc are independent

If you are restricted to using only one method to generate forecasts, you risk ignoring information regarding a) a larger set of explanatory variables. b) components of a data series emphasized by different models. c) a larger set of relationships among variables. d) the role of differing models assumptions in the forecast process. e) All the above

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A platter contains 4 peanut butter cookies, 6 oatmeal raisin cookies, 9 chocolate chip cookies, and x white chocolate macadamia nut cookies. Suppose you randomly select a cookie from the jar. Let C be the event that the cookie contains chocolate, and N the event that the contains nuts. What must x be in order for C and N to be independent?

An object moves along a coordinate line with acceleration v(t) = 6t 24. Its initial velocity is -10 and initial position 12 units to the left of the origin. Find the position of the object at time t = 2. Please provide step by step explanations and I'll rate best answer! THanks

Find the critical value z Subscript alpha divided by 2z/2that corresponds to alphaequals=0.120.12.

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Running head: CONTINUOUS PROBABILITY DISTRIBUTION Continuous Probability Distribution Anas F. Muqatish Mercy College 1 CONTINUOUS PROBABILITY DISTRIBUTION 2 1. Suppose the probability distribution of the lifetimes of the participants in the plan is approximately a normal distribution with a mean of 68 years and a standard deviation of 3.5 years.

In a sample of 70 stores a certain company, 58 violated a scanner accuracy standard. It has been demonstrated that the conditions for a valid large sample confidence interval for the true proportion of the stores that violate the standard were not met. Determine the number of stores that must be sampled in order to estimate the true proportion to

A study of 20 college students was conducted to see how many adults would have low bone mineral density, even at a younger age. Investigators wish to know what is the probability of having a bone mineral density score less than 2 units below the unknown mean bone mineral density (BMD) of the general college population country-wide. The standard

#9 Question: Two data sets are collected for the same parameter. Data set one: n=45 and Cpk=2.1. Data set two: n=30 and Cpk=3.3. A Cp is better with data set #2. B Cp is better with data set #1. C The difference in process centering is no different with the data sets. D Data set #2 has better centering.

Hypothesis Testing Assumptions For its validity, all hypothesis testing depends heavily on the assumption that the sample was drawn using probability sampling techniques. For this discussion, answer the following: Why is it important that a sample be random? What can you do if you cannot use a probability sampling technique? (For example, suppose

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