A random sample of 17 subjects was asked to perform a given task. The time in seconds it took each of them to complete the task is recorded below.47, 50, 40, 40, 48, 44, 39, 29, 34, 47, 27, 46, 46, 45, 47, 27, 35Send data to calculatorSend data to ExcelIf we assume that the completion times are normally distributed, find a 95% confidence interval for the true mean completion time for this task. Then find thelower limit and upper limit of the 95% confidence interval.Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.)Lower limit: |Upper limit:I

Given :Data points [47.0, 50.0, 40.0, 40.0, 48.0, 44.0, 39.0, 29.0, 34.0, 47.0, 27.0, 46.0, 46.0,…

Answered: A random sample of 17 subjects was…

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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A random sample of 12 subjects was asked to perform a given task. The time in seconds it took each of them to complete the task is recorded below. 39, 39, 30, 41, 32, 34, 48, 27, 28, 38, 33, 32 If we assume that the completion times are normally distributed, find a 95% confidence interval for the true mean completion time for this task. Then find the lower limit and upper limit of the 95% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.
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One personality test available on the World Wide Web has a subsection designed to assess the "honesty" of the test-taker. You are interested in the mean score, μ , among the general population on this subsection. The website reports that μ is 145 , but you have good reason to believe that μ is less than 145 . You decide to do a statistical test. You choose a random sample of people and have them take the personality test. You find that their mean score on the subsection is 140 and that the standard deviation of their scores is 22 . Based on this information, complete the parts below. (a) What are the null hypothesis H0 and the alternative hypothesis H1 that should be used for the test? H0: H1: (b) Suppose that you decide not to reject the null hypothesis. What sort of error might you be making? ▼(Choose one) (c) Suppose the true mean score among the general population on the subsection is 137 . Fill in the blanks to describe…
One personality test available on the World Wide Web has a subsection designed to assess the "honesty" of the test-taker. You are interested in the mean score, μ, among the general population on this subsection. The website reports that μ is 140, but you have good reason to believe that μ differs from 140. You decide to do a statistical test. You choose a random sample of people and have them take the personality test. You find that their mean score on the subsection is 146 and that the standard deviation of their scores is 22. Based on this information, complete the parts below. A. What are the null hypothesis H0 and the alternative hypothesis H1 that should be used for the test? H0: H1: B. Suppose you decide to reject the null hypothesis. Would you be making a type I or type II error?

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