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 20.35 points. A random sample of 15- om the current group of applicants had a mean score of 68.47 points. Based on these sample results, a statistician found for the population mean a confidence interval extending from 58.8545 to 78.0855 points. onfidence level (as a value between zero and one) of this interval.
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 20.35 points. A random sample of 15- om the current group of applicants had a mean score of 68.47 points. Based on these sample results, a statistician found for the population mean a confidence interval extending from 58.8545 to 78.0855 points. onfidence level (as a value between zero and one) of this interval.
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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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 20.35 points. A random sample of 15 test scores
from the current group of applicants had a mean score of 68.47 points. Based on these sample results, a statistician found for the population mean a confidence interval extending from 58.8545 to 78.0855 points. Find the
confidence level (as a value between zero and one) of this interval.
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