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In hypothesis testing the symbol a represents, The probability of not rejecting a false null hypothesis The level of significance, or the probability of committing a Type II error. The probability of rejecting a true null hypothesis. The level of significance, or the probability of committing a Type I error. Both a and b are correct. Both c and d are correct. Which of the following statements about Type I and Type II errors is correct Type I: Do not reject a false null hypothesis. Type II: Reject a true null hypothesis. Type I: Reject a false null hypothesis. Type II: Reject a true null hypothesis. Type I: Reject a true alternative hypothesis. Type II: Do not reject a false alternative. Type I: Reject a true null hypothesis. Type II: Do not reject a false null hypothesis. 3 You are testing the hypothesis that the mean expenditure on textbooks per semester by IUPUI students is less than $550. The null and alternative hypothesis statements for this test are: Ho: H > 550 H.: As 550 Ho: US 550 H,: u > 550 Hoi H 2 550 H.: A 80 Ho: H > 80 in op H, us 80 Hot H = 80 H,: H > 80 Hot H 0.85 6 You are testing the hypothesis that the mean student commuting distance to the IUPUI campus is at least 10 miles. The null and alternative hypothesis statements for this test are: Ho: H > 10 Hit us 10 Ho: H S 10 H,: H > 10 Hoi H x 10 Hit u 2 10 Hot H 2 10 Hit u 0.75 Ho: 1 2 0.75 H1: n 0.75 H,: It = 0.75 Ho: It 20 Ho: H > 20 Hit HS 20 Hot H