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8.) Rejecting a true null hypothesis a.) is a Type I error.b.) is a Type II error.c.) should not happen if a valid statistical test is used.d.) depends on the size of the estimation sample.Ans: aLevel: EasySection: 3.29.) For which alternative hypothesis do you reject H0if t≤t (,N-2)?
10.) For which alternative hypothesis do you reject H0if |t| ≤t (,N-2)?11.) How do you reduce the probability of committing a Type I error?12.) In which case would testing the null hypothesis involve a two-tailed statistical test?a.) H1: Incentive pay for teachers does affect student achievementb.) H1: Higher sales tax rates does not reduce state tax revenuesc.) H1: Extending the duration of unemployment benefits does not increase the length of joblessnessd.) H1: Smoking does not reduce life expectancyAns: aLevel: ModerateSection: 3.413.) In testing H0: 2= c using a .05 probability of a Type I error, you find a p-value of .38. What should you conclude?
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Statistics,Null hypothesis,Statistical hypothesis testing,Type I and type II errors