To lest for any significant difference in the number of hours between breakdowns for four machines, the following data were obtained. Machine 1 Machine 2 Machine 3 Machine 4 6.4 8.7 11.1 9.9 7.8 7.4 10.3 12.8 5.3 9.4 9.7 12.1 7.4 10.1 10.3 10.8 8.4 9.2 9.2 11.3 7.3 9.8 8.8 11.5 a. At the α = .05 level of significance, what is the difference, if any, in the population mean times among the four machines? b. Use Fisher’s LSD procedure to test for the equality of the means for machines 2 and 4. Use a .05 level of significance.

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STATISTICS F/BUSINESS+ECONOMICS-TE...

13th Edition
Anderson
Publisher: CENGAGE L
ISBN: 9781305881884
BuyFind

STATISTICS F/BUSINESS+ECONOMICS-TE...

13th Edition
Anderson
Publisher: CENGAGE L
ISBN: 9781305881884

Solutions

Chapter 13.3, Problem 18E
Textbook Problem

To lest for any significant difference in the number of hours between breakdowns for four machines, the following data were obtained.

Machine 1 Machine 2 Machine 3 Machine 4
6.4 8.7 11.1 9.9
7.8 7.4 10.3 12.8
5.3 9.4 9.7 12.1
7.4 10.1 10.3 10.8
8.4 9.2 9.2 11.3
7.3 9.8 8.8 11.5
  1. a. At the α = .05 level of significance, what is the difference, if any, in the population mean times among the four machines?
  2. b. Use Fisher’s LSD procedure to test for the equality of the means for machines 2 and 4. Use a .05 level of significance.

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Chapter 13 Solutions

STATISTICS F/BUSINESS+ECONOMICS-TEXT
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