Consider the compressive strength data in Exercise 8-26. (a) Use the sign test to investigate the claim
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(a) Use the sign test to investigate the claim that the median strength is at least 2250 psi. Use a = 0.05.
(b) Use the normal approximation to test the same hypothesis that you formulated in part (a). What is the P-value for this test?
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Applied Statistics And Probability For Engineers
ISBN: 9781118539712
6th Edition
Authors: Douglas C. Montgomery, George C. Runger
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