Question: Consider the compressive strength data in Exercise 8-26. (a) Use the sign test to investigate the claim that the median strength is at least 2250

Consider the compressive strength data in Exercise 8-26.
(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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