19. Your null hypothesis is ,u = 50. At the a = .01 level, with n=40, you compute a confidence interval of (4423.57.64). 20. Which of the following statements is ELISE? A. Condence intervals always are centered at the sample statistic. B. Condence intervals have different ranges, depending on the alpha level. C. Increasing the sample size will increase the range of the confidence interval, if all other elements are the same. 21. Compute the confidence interval for a two-tailed z-test where a = .05, n=16, a? = 70, and 02 = 64-. Use the following scenario for 22-23: A researcher is testing the hypothesis that drinking Starbucks changes [increases or decreases] your focus while taking tests. 22. Give an example of a Type I error the researcher could commit. 23. Give an example of a Type 11 error the researcher could commit. 24:27. Matching the following three groups The probability of correctly rejecting a a Type I error false null hypothesis The probability of incorrectly rejecting a 1-0: Power true null hypothesis The probability of correctly retaining a [3 Type ll error true null hypothesis. The probability of incorrectly retaining a 1-[3 false null hypothesis