Your statistics instructor wants you to determine a confidence interval estimate for the mean test score. Past experience indicated that tests scores are normally distributed with a sample mean of 160 and a population standard deviation of 45. The critical value to estimate a 95% confidence interval of the population means is A. 1.645 B. 1.96
Your statistics instructor wants you to determine a confidence interval estimate for the mean test score. Past experience indicated that tests scores are normally distributed with a sample mean of 160 and a population standard deviation of 45. The critical value to estimate a 95% confidence interval of the population means is A. 1.645 B. 1.96
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Step 1
Given Information:
Sample mean
Population standard deviation
Confidence level is 95%
Significance level
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