QUESTION 8Sample SizeSample MeanSample Standard DeviationdfConfidence Interval (in terms of New - Last Year)Confidence CoefficientLower LimitUpper LimitHypothesis Test (in terms of New - Last Year)Hypothesized ValueTest Statisticp-value (Lower Tail)p-value (Upper Tail)p-value (Two Tail)Sample SizeSample MeanSample Standard DeviationConfidence Interval (in terms of New - Last Year)New3675.166717.2105560.801.602510.230801.7786Last Year3669.250010.1090New-Last Year365.916723.3243 Sample SizeSample MeanSample Standard DeviationConfidence Interval (in terms of New - Last Year)Confidence CoefficientLower LimitUpper LimitHypothesis Test (in terms of New - Last Year)Hypothesized ValueTest Statisticp-value (Lower Tail)p-value (Upper Tail)p-value (Two Tail)New Last Tear365.916723.32430.800.838910.994401.5220IBM is interested in comparing the average project completion time using last year's software versus using the new software. So, a consultant for IBM randomlyselected 36 projects using last year's software and 36 projects using the new software. The completion time (in hours) for each project was recorded and thenentered into Excel. Can IBM conclude the average project completion time using the new software is greater than the average project completion time using lastyear's software at a=.005? Based on this paragraph of text, use the correct excel output above to answer the following question.For the hypothesis stated above, what is the decision (in terms of "New" minus "Last Year")?O a. Fail to reject Ho because p-value > a.b.Reject Ho because p-value > a.OC. Fail to reject Ho because p-value < a.Od. None of the answers is correctOe. Reject Hn because p-value < a.Click Save and Submit to save and submit. Click Save All Answers to save all answers.MacBook Pro

Given that: Test statistic, t=1.7786 Significance level, α=0.005 Degrees of freedom, df = 56

Answered: QUESTION 8 Sample Size Sample Mean…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The value of the z-score in a hypothesis test is influenced by a variety of factors. Assuming that all other variables are held constant, explain how the value of z is influenced by each of the following: Increasing the difference between the sample mean and the original population mean. Increasing the population standard deviation. Increasing the number of scores in the sample.
Age In a study of how depression may affect one’s abil-ity to survive a heart attack, the researchers reported the ages of the two groups they examined. The mean ageof 2397 patients without cardiac disease was 69.8 years 1SD = 8.7 years2, while for the 450 patients with car-diac disease, the mean and standard deviation of the ages were 74.0 and 7.9, respectively.a) Create a 95% confidence interval for the difference inmean ages of the two groups.b) How might an age difference confound these researchfindings about the relationship between depressionand ability to survive a heart attack?
QUESTION 11 A stock investor would like to have an idea concerning the average return of stocks that are traded on a certain exchange. In a sample of 93 stocks, the average return was 12 percent with a standard deviation of 4 percent. What is the lower boundof the 99% confidence interval? (please express your answer as a PERCENT using 2 decimal places)
Question 1 It is widely assumed that the average cost to produce a film is $60 million. A random sample of 15 action movies was selected and they had an average production cost of $62.3 million with a standard deviation of $3.25 million. At the 0.05 level of significance, can it be concluded that it costs more than average to produce an action movie? Question 2 Suppose a fair six-sided die is tossed to see if it fair. We roll the die 300 times and observe the frequency of occurrence of each of the faces. Since the die contains six sides, we expect that the number on each side will occur 50 times. The following frequencies were observed: Face value Occurrence 1 42 2 55 3 38 4 57 5 64 6 44 Conduct a Chi-sq Goodness of Fit test to see if the die should still be considered fair. Question 3 An analyst wanted to analyze the relationship between the speed of a car (x) measured in mph and its gas mileage (y). As an experiment a car is operated at several…
Question 1 It is widely assumed that the average cost to produce a film is $60 million. A random sample of 15 action movies was selected and they had an average production cost of $62.3 million with a standard deviation of $3.25 million. At the 0.05 level of significance, can it be concluded that it costs more than average to produce an action movie? Question 2 Suppose a fair six-sided die is tossed to see if it fair. We roll the die 300 times and observe the frequency of occurrence of each of the faces. Since the die contains six sides, we expect that the number on each side will occur 50 times. The following frequencies were observed: Face value Occurrence 1 42 2 55 3 38 4 57 5 64 6 44 Conduct a Chi-sq Goodness of Fit test to see if the die should still be considered fair. Question 3 An analyst wanted to analyze the relationship between the speed of a car (x) measured in mph and its gas mileage (y). As an experiment a car is operated at several…
Suppose a baseball player has a 0.2 probability of getting a hit in each time at bat.a. Describe the shape, mean, and standard deviation of the samplingdistribution of the proportion of times the player gets a hit after 36-at-bats.b. Explain why it would not be surprising if the player has a 0.3 average after 36 at-bats.
An auditor, examining a total of 820 accounts receivable of a corporation, took a random sample of 60 of them. The sample mean was $127.43, and the sample standard deviation was $43.27.a. Using an unbiased estimation procedure, find an estimate of the population mean.b. Using an unbiased estimation procedure, find an estimate of the variance of the sample mean.c. Find a 90% confidence interval for the population mean.d. A statistician found, for the population mean, a confidence interval running from $117.43 to $137.43. What is the probability content of this interval?e. Find a 95% confidence interval for the total amount of these 820 accounts.
Annual starting salaries for college graduates with business administration degrees are believed to have a standard deviation of approximately $2000. Assume that a 95% confidence interval estimate of the mean annual salary is desired. How large a sample should be taken if the desired margin is $500, $200, or $100?
a sample size do we require such that the margin of error for a 95% confidence interval for the mean height of female in the U.S. is maximum 0.5inches? Assume that the population standard deviation is 4 inches.
The value of the z-score in a hypothesis test is influenced by a variety of factors.Assuming that all other variables are held constant, explain how the value of z isinfluenced by each of the following:a. Increasing the difference between the sample mean and the original populationmean.b. Increasing the population standard deviation.c. Increasing the number of scores in the sample.
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