If a random sample of size 5 is taken, and the population is assumed to be normally distributed, what is the appropriate rejection region? Thank you!

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Suppose the null hypothesis of An : " = NO is being tested against the one – sided alternative hypothesis #|: " NO , altthe 5%6 level of significance . If a random sample of size 5 is taken , and the population is assumed to be normally distributed , what isthe appropriate rejection region’?"