The standard deviation of test scores on a certain achievement test is 11.5 . A random sample of 90 scores on this test had a mean of 70.4 . Based on this sample, find a 95% confidence interval for the true mean of all scores. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) What is the lower limit of the 95% confidence interval? What is the upper limit of the 95% confidence interval?
The standard deviation of test scores on a certain achievement test is 11.5 . A random sample of 90 scores on this test had a mean of 70.4 . Based on this sample, find a 95% confidence interval for the true mean of all scores. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) What is the lower limit of the 95% confidence interval? What is the upper limit of the 95% confidence interval?
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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Question
The standard deviation of test scores on a certain achievement test is
. A random sample of
scores on this test had a mean of
. Based on this sample, find a
confidence interval for the true mean of all scores. Then complete the table below.
11.5
90
70.4
95%
Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.)
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