Introduction to Probability and Statistics
Introduction to Probability and Statistics
14th Edition
ISBN: 9781133103752
Author: Mendenhall, William
Publisher: Cengage Learning
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Chapter 15, Problem 15.67SE

Yield of Wheat Exercise 11.68 presented ananalysis of variance of the yields of five different varieties of wheat, observed on one plot each at each ofsix different locations (see data set EX1168). The datafrom this randomized block design are listed here:

Chapter 15, Problem 15.67SE, Yield of Wheat Exercise 11.68 presented ananalysis of variance of the yields of five different

  1. Use the appropriate nonparametric test to determine whether the data provide sufficient evidenceto indicate a difference in the yields for the fivedifferent varieties of wheat. Test using α = .05.
  2. Exercise 11.68 presented a computer printout ofthe analysis of variance for comparing the meanyields for the five varieties of wheat. How do theresults of the analysis of variance F test comparewith the test in part a? Explain.

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A standard method of analyzing aspirin tablets has a known variance of 25. A sample of 10 aspirin tablets is selected and analysed for the amount of aspirin using a modified method, yielding the following results: 254, 249, 252, 252, 249, 249, 250, 247, 251, 252.  Determine whether the precision of the modified method is significantly different from that of the standard method at, alpha(a) = 0.05.
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Introduction to Probability and Statistics

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