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Mathematics Questions and Answers April 01, 2023

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Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution with= 2.8%.A random sample of 16 Australian bank stocks has a sample mean dividend yield of 8.91%. For the entire Australian stock market, the mean dividend yield is=6.4%.Ifyou wanted to test to determine ifthese data

In Whoville 20% of the whoes drive hovers. Suppose a simple random sample of 150 whose is obtained. The standard deviation for the number of whoes from whoeville who drive hovers in this simple random sample of 150 whoes is 4.899 With the above setting what is the probability that more than 25 of the whose from this simple random sample of 150

PubH 6035 Epidemiology: Uncovering the Science of Public Health - Summer 2017 Module 2 Assignment: Descriptive Epidemiology Case Study To complete the assignment, access the following resource: Howlader N, Noone AM, Krapcho M, Miller D, Bishop K, Kosary CL, Yu M, Ruhl J, Tatalovich Z, Mariotto A, Lewis DR, Chen HS, Feuer EJ, Cronin KA (eds). SEER

Attached are some questions on probability and statistics \f\f
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True or false:In a left-tailed test, the value of the test statistic is -2. The test statistic follows adistribution with the distribution curve shown below. If we know the shaded area is 0.03, then we have sufficient evidence to reject the null hypothesis at 0.05 level of significance

Question 1. Five-card stud is a poker game, in which a player is dealt 5 cards from an ordinary deck of 52 playing cards. How many distinct poker hands could be dealt? Question 2 How many different ways can you arrange the letters X,Y and Z without repeating letters?(Hint: In this problem, order is important; i.e.., XYZ is considered a different

Name:___________________ID:__________________AMS______ Extra credit opportunity Enter your answers on the blanks provided below. Show any work on page 3: Infinite Finite a.___________ a.____________ c.___________ c.____________ d.___________ d.____________ e.___________ e.____________ f. f. Note: 2 = 1.414, 3 / 2 = .866 Please give answers in

A bank with branches located in a commercial district of a city and in a residential district has the business objective of developing an improved process for serving customers during the noon-to-1 P.M. lunch period. Management decides to first study the waiting time in the current process. The waiting time is defined as the time that elapses from

Question 7: Test for goodness of fit (Please assist in helping me with these questions which I need to check my own answers against) A chewing gum manufacturer wishes to determine if his customers prefer one flavor gum to any other flavor. He selects a random sample of customers and records the flavor of gum that is purchased. Determine the

Mimi is interested in testing the claim that banana is the favorite fruit for more than 50% of the adults.She conducted a survey on a random sample of 100 adults. 58 adults in the sample chose banana as his / her favorite fruit. Assume Mimi wants to use a 0.10 significance level to test the claim. (a)Identify the null hypothesis and the

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NAME : MATH 1151 AUTUMN 2017 WRITTEN HOMEWORK 2 INSTRUCTIONS : Calculators are permitted EXCEPT those calculators that have symbolic algebra or calculus capabilities. SHOW ALL WORK ! Incorrect answers with work shown may receive partial credit, but unsubstantiated answers will receive NO credit. MSLC tutors are not allowed to help you with this

In a recent court case it was found that during a period of 11 years 899 people were selected for grand jury duty and 40 % of them were from the same ethnicity. Among the people eligible for grand juryduty, 78.6 % were of this ethnicity. Use a 0.05 significance level to test the claim that the selection process is biased against allowing this

Sixty adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below: # of flossing per week: Frequency: Relative Frequency: Cumulative Relative Frequency: 0270.4500----------- 1 18------- ----------- 3 --- ---------0.9333 6 30.0500---------- 7 10.0167---------

Mimi just started her tennis class three weeks ago. On average, she is able to return 20% of her opponents serves. Assume her opponent serves 10 times. (a) Let X be the number of returns that Mimi gets. As we know, the distribution of X is a binomial probability distribution. What is the number of trials (n), probability of successes (p) and

Do one of the following,as appropriate (a) Find the critical value z a/2 (b) Find the critical value t a/2 98% n=7.a=27 population appears to be normally distributed

Assume a member is selected at random from the population represented by the graph. Find the probability that the member selected at random is from the shaded area of the graph. Assume the variable x is normally distributed. 200

The following data are from a completely randomized design. For requirements a-f, show your work. \f
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Sleeping Time I want to analyze the sleeping time of friends and family. I expect my range to lie between 7-8 hours. I want to test the hypothesis if average number of hours of sleep is greater than 8. I ask my face-book friends about the average number of hours they sleep in a week. I also note their gender. The age group I select is 18 - 25. The

Sample is 26, 49, 9, 42, 60, 11, 43, 26, 30,14. What is the variance and standard deviation

The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. Assume that the population standard deviation is 2 . 3 gallons. The mean water usage per family was found to be 18 . 5 18.5 gallons per day for a sample of 717 families. Construct the 80 % confidence interval for the mean

Suppose that the scores on a reading ability test are normally distributed with a mean of 70 and a standard deviation of 9. What proportion of individuals score at most 54 points on this test? Round your answer to at least four decimal places.

If we are testing the significance of the independent variable X1and we reject the null hypothesisH0: B1 = 0, we conclude that: A) B1 is not significantly related to the dependent variable B) X1is significantly related to the dependent variable C) X1 is not significantly related to the dependent variable D) B1is significantly related to the

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Find the amount of each payment to be made into a sinking fund earning 7 % compounded monthly to accumulate $ 58,000 over 5 years. Payments are made at the end of each period. The payment size is $_____

PSY 335 Interpreting Statistics Worksheet Testing of 20 randomly selected subjects yielded two sets of scores: Verbal IQ and Reading Comprehension. The table below displays the results and descriptive statistics, as well as frequency distribution charts for each variable and a scatterplot of the correlations between the two variables: Reading

7.Two hundred fifty managers with degrees in business administration indicated their fields of concentration as shown below. Major Top Management Middle Management Total Management 65 60 125 Marketing 30 20 50 Accounting 25 50 75 TOTAL 120 130 250 At = .01 using the p -value approach, test to determine if the position in management is independent

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First City National Bank1 Sandra Boxer, vice president of operations for First City National Bank of Philadelphia is considering a change in teller operations. Currently, the bank's tellers are arranged in pods to handle customer transactions. There are four pods containing three teller stations each. One pod is used primarily for savings accounts

1.The following are data for 12 individuals daily sodium intake. Is there significant evidence that the population mean daily sodium intake differs from 7.2? Show allhypothesis testing steps. (You can use EXCEL to calculate the summary statistics) Subject: 1 2 3 4 5 6 7 8 9 10 11 12 sodium intake: 6.6 7.2 6.7 7.4 7.1 6.8 7.2 7.3 7.5 6.9 6.7 6.2

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A multiple regression analysis with 20 observations on each of three independent variables and the dependent variable would yield ______ and _______ degrees of freedom, respectively, for regression (explained) the error. A) 3, 20 B) 3, 19 C) 3, 17 D) 4, 16 E) 3, 16 Which one of the following is not an assumption about the residuals in a regression

Name:_____________________________ Project Part B Answer the following questions using the data in a the AJ case file (the data set you already have in your course file) Answer A-D A. The Manager of AJ believe the average (mean) annual income of customers was less than $50,000. Using the data set annual income, is there convincing evidence that

Roddy and Ganz Assessments Due Date: Dec 21, 2016 23:59:59 Max Points: 40 View Rubric Details: Use "Roddy and Ganz Worksheets" to complete an assessment of the research studies: "Evidence-Based Clinical Guidelines: A New System to Better Determine True Strength of Recommendation" (Roddy et al.) and "ICU Nurses' Oral-Care Practices and the Current

a.) You deposit $500 each month into an account earning 3% interest compounded monthly. How much will you have in the account in 15 years? How much total money will you put into the account? how much interest will you earn>

H0 mean = 92 H1 mean = #92 Test sample 576 and the sample mean 85.10, population standard deviation 72 assume population is approximately normal. Compute P value?

Fuel efficiency of manual and automatic cars, Part I: Each year the US Environmental Protection Agency (EPA) releases fuel economy data on cars manufactured in that year. Below are summary statistics on fuel efficiency (in miles/gallon) from random samples of cars with manual and automatic transmissions manufactured in 2012. Do these data provide
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Sample annual salaries (in thousands of dollars) for employees at a company are listed. 53 50 62 61 28 28 53 50 62 26 61 53 47 (a) Find the sample mean and sample standard deviation. (b) Each employee in the sample is given a 6 % raise. Find the sample mean and sample standard deviation for the revised data set. (c) To calculate the monthly

We can use the analysis of variance procedure to test hypotheses about: the proportion of one population two or more population means the mean of one population two or more population proportions

STAT 200: Introduction to Statistics Final Examination, Spring 2017 OL1/US1 Page 1 of 8 STAT 200 OL1/US1 Sections Final Exam Spring 2017 The final exam will be posted at 12:01 am on March 3, and it is due at 11:59 pm on March 5, 2017. Eastern Time is our reference time. This is an open-book exam. You may refer to your text and other course

In a survey of 150 seniorexecutives, 50 % said that the most common job interview mistake is to have little or no knowledge of the company. Use a 0.05 significance level to test the claim that in the population of all seniorexecutives, 40 % say that the most common job interview mistake is to have little or no knowledge of the company. Identify

In a chemical reaction, the rate at which the amount of a reactant changes with time is proportional to the amount present, such that dy/dx=-0.7y, when t is measured in hours. If there are 78g of reactant present when t=0, how many grams will be left after 4 hours? Give your answer to the nearest tenth of a gram.

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A firm's production function is Q(K,L) = 8K 1/2 +L 1/2 whereandare respectively,capital and labour costs. Unit capital and labour costs are 25 and 1, respectively.What is the minimum total of input costs (that is, costs due to capital andlabour) if output Q is to be 240 units? You may assume a minimum point exists. Round your answer to 2 decimal

A researcher conducted a two-way ANOVA and found the following results for one of the main effects, F (2, 347) = 9.84, p = .005, 2 = .010, observed power = .87. How can the researcher interpret the effect size?

What are fitting curves and learning curves in data analytics? How are each of these is useful

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Name: Answers consider the multiple regression model Use the following observations. y 124 25 22 90 73 84 74 26 x 1688 946 1150 1613 875 1435 1588 1077 E(y) = + x + x x 49 35 64 43 49 47 34 43 50 74 56 120 111 108 85 82 160 116 83 121 1 925 1986 1322 1437

4. Determine the value of x2 for 23 degrees of freedom and an area of .990 in the left tail of the chi-square distribution curve. What is the value of chi-square? Round to three decimal places.

(1 point) Consider the following geometry problems in 3-space Enter T or F depending on whether the statement is true or false. (You must enter T or F -- True and False will not work.) 1. Two lines parallel to a plane are parallel 2. Two planes orthogonal to a line are parallel 3. Two lines orthogonal to a third line are parallel 4. Two lines

The National Center for Education Statistics reports that the proportion of college freshmen who return to the same school for their sophomore year is0.69. Suppose we select a random sample of460freshmen from across the nation. Question 1 . What is the expected value of the sampling distribution model for the proportion of460freshmen that will

If three differently colored dice are rolled at the same time, what is the probability that a 6 will be the outcome on each one?

1- Solve the problem. Elaine gets grades of 71, 75 and 64 in a test. Finish with 60 in your final exam. Calculate the weighted average if the test weigh 20% and the final exam 40% of the final grade. Round to a decimal at. 66 b. 68.2 c. 67.5 D.65 2- Solve the problem The results of a test obtained have an average of 70 and a standard deviation 11.

1. 1. Set up a Github account (you may use your own name or a pseudonym). 2. Create a repo called datasciencecoursera 3. Submit the link to your GitHub account (or a direct link to your datasciencecoursera repo) Provide that link here Question 2. 1. 2. Create a text file called HelloWorld.md Add the line "## This is a markdown file" (without the

100 adults were asked if the drinking age should change to 18 yrs old in the US Asked Yes No Women 24 14 Men 34 28

The following table shows the twowag.-r ANGVA output for the weights of poplar trees. Test the hypothesis that the weights of poplar trees are not affected by an interaction between site and treatment. Source DF SS MS F P Site 3 2.4116 QEESSM 3.11 (1.1113? Treatment 1 {13113 {13 F1 1?? 1.4G- {1.243 Interaction 3 2.6168 3.315 {1.1123 Error 44:}
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H0 mean = 16 H1 mean = <16 Test sample 100 and the sample mean 6.11, population standard deviation 60 assume population is approximately normal. Compute P value?

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http://epiville.ccnmtl.columbia.edu/modules.html In SARS Outbreak study 2: Questions : What are the most cost effective and easily implementable ways of manipulating the parameters of reproductive rate to slow the spread of the SARS epidemic? Which of the parameters do you expect would be the most difficult to alter? What if the disease in

Assume that an air passenger has a probability of 1/ 6 of being assigned seat F and a probability of 1/ 4 of getting the special mean that she ordered. If the probability that the passenger has a probability of 1/ 3 of getting the meal they ordered or sitting in seat F what is the probability that they are seated in seat F and receive the meal the

Blue Orange Green Yellow Red Brown Total 10 14 12 11 7 11 9 8 13 10 6 10 9 6 11 8 10 8 14 5 10 10 13 10 8 11 12 11 9 8 8 5 11 5 13 7 9 9 8 9 9 15 11 10 6 7 8 7 6 10 7 16 11 8 9 6 9 10 7 8 7 6 9 8 4 10 8 14 10 9 4 5 5 8 6 9 8 8 6 4 9 10 12 16 8 9 11 6 12 13 4 12 6 5 13 3 11 6 8 7 6 7 6 7 10 7 7 4 12 4 5 9 3 5 7 7 8 7 4 7 9 5 7 5 4 6 5 7 8 5 2 9 3 6

For a multistate lottery, the following probability distribution represents the cash prizes of the lottery with their corresponding probabilities. See full question in attachment. Thank you. \f
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2/8 Submissions Used | Previous Answers WaneFM7 4.2.037. Ask Your Teacher My Notes Question PartPoints This exercise should be done two ways: by hand and using technology where possible. Let A = 6 60 5 05 , B =301 2 11 , C = x 1 wzr 4 . Evaluate the following. A ( B + C )

1. In a drawer, I have five batteries three that work and two that do not work. If I grab three batteries, what is the probability that only one works. A school offered blood pressure screening for its employees. The results are shown in the table. a. We choose an employee at random, what is the probability that this person is a 30 to 49-year-old

see attached file please Thanks in advance for your help with this question \f
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True or false. Please explain why for each problem thank you \f\f\f
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A banks loan officer rates applicants for credit. The ratings are normally distributed with a mean of 200 and a standard deviation of 50. If an applicant is randomly selected, find the probability of a rating that is between 225 and 275

Provide an appropriate response. In a study of the relationship between weight and height, a sample regression equation is obtained, in which height is used as the predictor variable. This sample regression equation is then used to make inferences. Which of the following statements is true? A 95% confidence interval for the mean weight of all

83% of the people in a community own a computer. If 80 people are randomly selected from the community, estimate the probability that at least 70 of them own a computer. Please show work.

Suppose that pulse rates among healthy adults are normally distributed with a mean of 80 beats/second and a standard deviation of 10 beats/second. What proportion of healthy adults have pulse rates that are at most 76 beats/sec? Round your answer to at least four decimal places.

Consider the following data drawn independently from normally distributed populations: UseTable 1. X1= 31.6 X2= 26.8 1 2 = 91.9 2 2 = 90.0 n 1 = 20 n 2 = 26 a. Construct the 99% confidence interval for the difference between the population means. (Negative values should be indicated by a minus sign. Round all intermediate calculations to at least

Una empresa debe pagar dentro de 6 meses la cantidad de $400,000. Para asegurar el pago, el contralor propone, dado que hay liquidez en la empresa, acumular un fondo mediante depsitos mensuales a una cuenta que paga 9% convertible mensualmente. Realizar la tabla del fondo de amortizacin.

Find each of the following probabilities for a normal distribution. a. p(z>1.25) b. p(z>-0.60) c. p(z < 0.70) d. p(z < -1.30)

Let A = [-2 4] , and B= [-2. 1] 1 3 3 8 a. Find AB , if possible. A. AB= _______. B. The product AB cannot be found. b. Find BA, if possible. A. BA= ________. B. the product BA cannot be found. c. Are the answers in parts a and b the same? A. yes B. no d. Ingeneral, for matrices A and B such that AB and BA bothexist, does AB always equalBA? A. Yes

Part variability is critical in the manufacturing of ball bearings. Large variances in the size of the ball bearings cause bearing failure and rapid wear out. Production standards call for a maximum variance of .0001 when the bearing sizes are measured in inches. A sample of 15 bearings shows a standard deviation of 0.014 inches. Use a level of

For the data from the 1977 Stat. and Biom. 200 class for eye color, construct: a. pie graph b. horizontal bar graph c. vertical bar graph d. a frequency table with the relative frequency of each eye color

18. Information from the Department of Motor Vehicles indicates that the average age of licensed drivers is u=45.7 years with a standard deviation of o=12.5 years. Assuming that the distribution of drivers ages is approximately normal. a. What proportion of licensed drivers are older than 50 years old? b. What proportion of licensed drivers are

1. Two football teams play in the Super Bowl. The event of team A winning and the event of team B winning can be said to be mutually exclusive. True or False? 2. Classical probability assessment is likely to be the most common method of probability assessment used in business decision making. True or False? 3. One of the difficulties in using the

can you please help me with this assignment. you can do them while i work on them on my own so i can compare. i do not have a foundation in this area and i am working hard to get it done. PLEASE SHOW WORKINGS. QUESTIONS 20 - 40 ONLY.

Hi, I need a very through explanation to the following math questions.... I need you guys to use the "counting principle to answer it." The possible four digit telephone number extensions that can be formed if 0,8,9 are excluded as first digit? 2. Two digits are formed, with replacement, from digits 0 through 9? a) How many two digits numbers are

The lifetime of a certain brand of battery is known to have a standard deviation of 16 hours. Suppose that a random sample of 80 such batteries has a mean lifetime of 33.4 hours. Based on this sample, find a 95% confidence interval for the true mean lifetime of all batteries of this brand. Then complete the table below.Carry your intermediate

.this is the 3 times I pay to get this help right ...no body provide me with a good answer and answer the question properly ....hope this times some will help me properly... . Suppose that there are two (2) candidates (i.e., Jones and Johns) in the upcoming presidential election.Sara notes that she has discussed the presidential election

Consider two people being randomly selected (For simplicity, ignore leap years.) What is the probability that two people have a birthday in May? I tried to answer the question by doing 1/12*1/12= 1/144 but it's apparently wrong. What can i do ?

Can someone help me come up with a totally different problem using replacement and without replacement and to solve the answer as well? Here's an example question of using replacement and without replacement: Let's look at a standard deck of 52 cards. What is the probability of getting 2 kings assuming that the first one is not replaced? 4/52 *

4) Merck Research Labs conducted an experiment to evaluate the effect of a new drug using the Single-T Swim maze.Nineteen impregnated dam rats were captured and allocated a dosage of 12.5 milligrams of the drug.One male and one female were randomly selected from each resulting litter to perform in the swim maze.Each rat pup is placed in water at

six different second year medical students at bellevue hospital measured the blood pressure of the same person. The systolic reading (in mmHg) are listed below. Find the range, variance, and standard deviation for the given sample data. if the subject's blood pressure remains constant and the medical students correctly apply the same measurement

The mean height of a certain kind of plant is 173 centimeters. Suppose we want to carry out a hypothesis test to see if the mean height when these plants are treated with a certain chemical differs from 173. State the null hypothesis H0 the alternative hypothesis H1 that we would use for this test. H0 : ____ H1 : ____

There are many different types of measurements, varying along several important dimensions. Which type of measure would be especially likely to take advantage of a PROMIS item bank? A.A disease-specific measure B.A static measure C.An adaptive measure D.A categorical measure

A new surgery is successful 80% of the time. If the results of7 such surgeries are randomly sampled, what is the probability that at least 6 of them are successful? Carry your intermediate computations to at least four decimal places, and round your answer to at least two decimal places.

Use newtons method to find the fixed points of the function where f(x)=x Use Newton's method to nd the xed point(s) of the function where f(X) = X. (Enter your answers as a comma-separated list. Round your answer(s) to three decimal places.) eX4
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From generation to generation, the mean age when smokers first start to smoke varies. However, the standard deviation of that age remains constant of around 2.1 years. A survey of 40 smokers of this generation was done to see if the mean starting age is at least 19. The sample mean was 18.1 with a sample standard deviation of 1.3. Do the data

t 1111ij t : . l at * elm ll l < A Rink'e All Media 3/12/17, 5:42 PM as designed to incre It too v aset e number of hours each Ix It studled per week. Eight randomly selected students 0 am. The table below shows the number of hours Beforeprogram 8 12 10 12 5 10 10 12 Afterprogram 12 11 14 15 8 15 9 6 At the 10?6 level of significance, can it be

When treated with an antibiotic, 91% of all the dolphins are cured of an ear infection. If 8 dolphins are treated, find the probability that exactly 4 are cured. What is the probability that 4 are cured? (The answer must be rounded to four decimal places)

The mean value of land and buildings per acre from a sample of farms is $ 18001800 , with a standard deviation of $ 300 . The data set has a bell-shaped distribution. Assume the number of farms in the sample is 7373 . (a) Use the empirical rule to estimate the number of farms whose land and building values per acre are between $ 1200 and 2400 .

find the value of the test statistic z using z=p-p/pq-n a claim is made that the proportion of children who play sports is less than 0.5 and the sample statistics include n =1899 subjects with 30% saying that they play a sport. please show steps.

EDR-8202: Statistics II Week 3 Worksheet SPSS Week 3: Correlation and Regression This week, you will complete two exercises related to both correlation and regression. Part 1: Correlation: Download the data set SPSSexam.sav from this week's resources. Review both the Data View and the Variable View to obtain a general understanding of the data. To

Please show all work and do not use excel functions tor find answers. 1. A sample of retailers reported that they had the following number of copies of statistics textbooks in inventory: 57, 81, 69, 84, 85, 79, 71, 74, 55. a. What is the mean number of textbooks in inventory? b. What is the median number of textbooks in inventory? c. What is the

Assume the weight of a randomly chosen American passenger car is a uniformly distributed random variable ranging from 2,966 pounds to 4,063 pounds. (a)What is the mean weight of a randomly chosen vehicle? (Round your answer to the nearest whole number.) Mean weight (b)What is the standard deviation of a randomly chosen vehicle? (Round your answer

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The number of days worked during the working careers of males and females in a town was being studied. Samples were taken of 20 women and 27 men that had means of 12.867 for women and 16.496 for men and standard deviations of 8343 for women and 7914 for men. Does the data support the idea that men worked more than women? Calculate the t-statistic,

Graph sin(x)e x2 . Find its maxima, minima, and inflection points in the region2 < x <2. Make sure to show some calculus related work, but feel free to use the capabilities of GeoGebra and/or a calculator.

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