19A) Solve the following using Statistic materials: A) A student takes a 10-question multiple-choice exam, but did not study and randomly guesses each answer. Each question has three possible choices. Find the probability that the student guesses 50% correct. B) It is known that 15% of the seniors in a large high school enter military service upon graduation. If a group of 20 seniors are randomly selected, what is the probability of observing at least two who will be entering military service? C) It has been estimated that only about 30% of California residents have adequate earthquake supplies. Suppose you randomly survey 11 California residents. We are interested in the number who have adequate earthquake supplies. Is it more likely that none or that all of the residents surveyed will have adequate earthquake supplies? Explain why using mathematical justification.
19A) Solve the following using Statistic materials:
A) A student takes a 10-question multiple-choice exam, but did not study and randomly guesses each answer. Each question has three possible choices. Find the probability that the student guesses 50% correct.
B) It is known that 15% of the seniors in a large high school enter military service upon graduation. If a group of 20 seniors are randomly selected, what is the probability of observing at least two who will be entering military service?
C) It has been estimated that only about 30% of California residents have adequate earthquake supplies. Suppose you randomly survey 11 California residents. We are interested in the number who have adequate earthquake supplies. Is it more likely that none or that all of the residents surveyed will have adequate earthquake supplies? Explain why using mathematical justification.
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