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Suppose that a t test is being conducted at the .05 level of significance to test Ho: mu=50 vs. Ha: mu <50. A sample of

Suppose that a t test is being conducted at the .05 level of significance to test Ho: mu=50 vs. Ha: mu<50. A sample of size 20 is randomly selected. The rejection region is:

a) t > 1.725

b) t < -1.729

c) t > -2.093

d) t < 2.086

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