An existing inventory for a test measuring self-esteem indicates that the scores have a standard deviation of 12. A psychologist gave the self- esteem test to a random sample of 50 individuals, and their mean score was 63. Construct a 90% confidence interval for the true mean of all test scores. Then give its lower limit and upper limit. 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: 0 Upper limit: I

An existing inventory for a test measuring self-esteem indicates that the scores have a standard deviation of 12. A psychologist gave the self- esteem test to a random sample of 50 individuals, and their mean score was 63. Construct a 90% confidence interval for the true mean of all test scores. Then give its lower limit and upper limit. 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: 0 Upper limit: I

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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We would like to create a confidence interval for the mean. Which of the following would produce the smallest margin of error? Select one: a.A 95% confidence level and a sample size of 150 subjects b. A 99% confidence level and a sample size of 600 subjects. c. A 99% confidence level and a sample size of 150 subjects. d.A 95% confidence level and a sample size of 600 subjects.
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