Explain the analogy between type 1 and the type II errors in a test of hypothesis and the false positive and false negative results that occur in diagnostic testing.

Under what circumstances might you use a one-sided test of hypothesis rather than a two-sided test?

When the alternate hypothesis does specify a direction, then a one-sided test of hypothesis could be used. In general, a one-sided test hypothesis is appropriate when a large difference in one direction would lead to the same action as no difference at all.


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