Question 22: When do we use za/2 and when do we use to/2 to compute a confidence interval around a (3 Points) sample mean (m)? Words: 0 / 50 Question 23: If the null hypothesis is that uj = 12 and the 95% CI around m1-my is [1, 6], explain why this CI (2 Points) should, or should not, lead me to reject the null hypothesis for a two tailed test assuming a = .05. o search T. W P 24. F