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A selection process to be set in a position in GM company. Candidates are requested to complete an aptitude test. The results from the test are assumed to follow a normal distribution with standard deviation, equal to 1.2. A simple random sample of 16 results from the test has a sample mean of 4.2.

A selection process to be set in a position in GM company. Candidates are requested to complete an aptitude test. The results from the test are assumed to follow a normal distribution with standard deviation, equal to 1.2. A simple random sample of 16 results from the test has a sample mean of 4.2.

MATLAB: An Introduction with Applications
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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A selection process to be set in a position in GM company. Candidates are requested to complete an aptitude test. The results from the test are assumed to follow a normal distribution with standard deviation, equal to 1.2. A simple random sample of 16 results from the test has a sample mean of 4.2. You are given a confidence interval computed by a researcher for the preceding data, going from 3.83 to 4.57. Which confidence level was used to compute this interval? O 78.14% O 82.3% 67.78% O 74.58%
Transcribed Image Text:A selection process to be set in a position in GM company. Candidates are requested to complete an aptitude test. The results from the test are assumed to follow a normal distribution with standard deviation, equal to 1.2. A simple random sample of 16 results from the test has a sample mean of 4.2. You are given a confidence interval computed by a researcher for the preceding data, going from 3.83 to 4.57. Which confidence level was used to compute this interval? O 78.14% O 82.3% 67.78% O 74.58%
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