Determine the p-value for each of the following hypothesis-testing situations:

a. H0: p = 0.25 and Ha: p ¹ 0.25; z test value = 1.84

b. H0: m ³ 13.5 and Ha: m < 13.5; t test value = -1.94 d.f. = 10

Solution: (a) This is a two-tailed z-test, so the p-value is computed as

(b) This is a lower-tailed t-test, so we have


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