sample results, a statistician found for the population mean a confidence interval extending from 59.5359 to 87.0241 points. Find the confidence level (as a value between zero and one) of this interval.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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A personnel manager has found that, historically, the
scores on aptitude tests given to applicants for entry-
level positions follow a normal distribution with
standard deviation 24.64 points. A random sample of
11 test scores from the current group of applicants
had a mean score of 73.28 points. Based on these
sample results, a statistician found for the population
mean a confidence interval extending from 59.5359 to
87.0241 points. Find the confidence level (as a value
between zero and one) of this interval.
Transcribed Image Text:A personnel manager has found that, historically, the scores on aptitude tests given to applicants for entry- level positions follow a normal distribution with standard deviation 24.64 points. A random sample of 11 test scores from the current group of applicants had a mean score of 73.28 points. Based on these sample results, a statistician found for the population mean a confidence interval extending from 59.5359 to 87.0241 points. Find the confidence level (as a value between zero and one) of this interval.
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