Differentiate between one- and two-tailed tests of hypothesis. How is the rejection region determined for a one-tailed test?
What will be an ideal response?
In one-tailed tests of hypothesis, the rejection region occurs only in one tail of the distribution whereas in two-tailed tests of hypothesis, the rejection region will occur in both the upper and lower tails of the distribution.
Determining the correct tail of the distribution to use as the rejection region for a one?tailed test is easy. If H1 is stated as "<," the rejection region is in the lower tail; if H1 is stated as ">," the rejection region is in the upper tail.
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