PLEASE ANSWER ALL 5

10. Suppose that airline passengers successfully catch their flights 85% of the time. If you track 60 random passengers, find the probability that at most 50 of them catch their flights. A. 0.5714 B. 0.4286 C. 0.3584 D. 0.6406 E. None of these 11. When calculating a Confidence Interval for p, which of the following critical values are used? (select all that apply) A. z-scores B. t-scores C. xz-scores D. Percentiles E. None ofthese 12. When calculating a Confidence Interval for 11, which level of confidence shown below is NOT an acceptable level to use? A. 99% B. 95% C. 90% D. 50% E. None of these 13. Which formula shown below is used to calculate Degrees of Freedom? A. nl B.n2 C.n3 D.n4 E. Noneofthese 14. When calculating a Confidence Interval for cr, which of the following critical values are used? (select all that apply) A. t-scores B. z-scores C. xz-scores D. Percentiles E. None of these