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2. A maintenance supervisor is comparing the standard version of an instructional booklet with one that has been claimed to be superior. An experiment is conducted in which 26 technicians are divided into two groups, provided with one of the booklets, then given a test a week later. For the 13 using the standard version, the average exam score was 72.0, with a standard deviation of 9.3. For the other 13 using the new version, the average score was 80.2, with the standard deviation of 10.1. Assume normal populations with equal standard deviations, and using the 5% level of significance, does the standard version booklet appear to be better than the new version?

2. A maintenance supervisor is comparing the standard version of an instructional booklet with one that has been claimed to be superior. An experiment is conducted in which 26 technicians are divided into two groups, provided with one of the booklets, then given a test a week later. For the 13 using the standard version, the average exam score was 72.0, with a standard deviation of 9.3. For the other 13 using the new version, the average score was 80.2, with the standard deviation of 10.1. Assume normal populations with equal standard deviations, and using the 5% level of significance, does the standard version booklet appear to be better than the new version?

A First Course in Probability (10th Edition)
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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2. A maintenance supervisor is comparing the standard version of an instructional booklet with one that has been claimed to be superior. An experiment is conducted in which 26 technicians are divided into two groups, provided with one of the booklets, then given a test a week later. For the 13 using the standard version, the average exam score was 72.0, with a standard deviation of 9.3. For the other 13 using the new version, the average score was 80.2, with the standard deviation of 10.1. Assume normal populations with equal standard deviations, and using the 5% level of significance, does the standard version booklet appear to be better than the new version?
Transcribed Image Text:2. A maintenance supervisor is comparing the standard version of an instructional booklet with one that has been claimed to be superior. An experiment is conducted in which 26 technicians are divided into two groups, provided with one of the booklets, then given a test a week later. For the 13 using the standard version, the average exam score was 72.0, with a standard deviation of 9.3. For the other 13 using the new version, the average score was 80.2, with the standard deviation of 10.1. Assume normal populations with equal standard deviations, and using the 5% level of significance, does the standard version booklet appear to be better than the new version?
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