You sample with size N from a normal population and want to test 0: = 12 vs. 1: does not equal 12 .What is the P-value of the test if a) X bar= 12.623 , s = 1.25 , and N = 25.
b) X bar= 12.5, s= 1.25, and N=36.
c) X bar= 12.6,N=25, and sigma is known to be 1.25
Answers: (a) _ (b) _

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