Rejection of the null hypothesis

  1. What is the critical value for a one-tailed z test? For a two-tailed z test? Which is more likely to result in a rejection of the null hypothesis? Why?
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  2. Why does tcv. Change when the sample size changes? What must be computed to determine tcv.?
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  3. Henry performed a two-tailed test for an experiment in which N = 24. He could not find his table of t critical values, but he remembered the tcv at df = 13. He decided to compare his tobt with this tcv. Is he more likely to make a Type I or a type II error in this situation? Briefly discuss why.