A company manufactures printers and fax machines at plants located in Atlanta, Dallas, and Seattle. To measure how much employees at these plants know about quality management, a random sample of 6 employees was selected from each plant and the employees selected were given a quality awareness examination. The examination scores for these 18 employees are shown in the following table. The sample means, sample variances, and sample standard deviations for each group are also provided. Managers want to use these data to test the hypothesis that the mean examination score is the same for all three plants. Sample mean Sample variance Sample standard deviation Plant 1 Atlanta 84 76 83 77 72 88 80 35.6 5.97 Plant 2 Dallas 71 76 72 75 68 82 74 23.6 4.86 Plant 3 Seattle 60 64 63 69 75 59 65 36.4 6.03
A company manufactures printers and fax machines at plants located in Atlanta, Dallas, and Seattle. To measure how much employees at these plants know about quality management, a random sample of 6 employees was selected from each plant and the employees selected were given a quality awareness examination. The examination scores for these 18 employees are shown in the following table. The sample means, sample variances, and sample standard deviations for each group are also provided. Managers want to use these data to test the hypothesis that the mean examination score is the same for all three plants. Sample mean Sample variance Sample standard deviation Plant 1 Atlanta 84 76 83 77 72 88 80 35.6 5.97 Plant 2 Dallas 71 76 72 75 68 82 74 23.6 4.86 Plant 3 Seattle 60 64 63 69 75 59 65 36.4 6.03
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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Expert Solution
Step 1
The given data is
Plant 1 Atlanta | Plant 2 Dallas | Plant 3 Seattle | |
84 | 71 | 60 | |
76 | 76 | 64 | |
83 | 72 | 63 | |
77 | 75 | 69 | |
72 | 68 | 75 | |
88 | 82 | 59 | |
Sample mean | 80 | 74 | 65 |
Variance | 35.6 | 23.6 | 36.4 |
Sample standard deviation | 5.97 | 4.86 | 6.03 |
Here we perform the one-way ANOVA.
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