18. The distribution ages for students at the state college is positively skewed with a mean of u standard deviation of o = 3. a. What is the probability of selecting a random sam- ple of n = 4 siudents with an average age greater = 21.5 and a %3D than 23? (Careful: This is a trick question.) b. What is the probability of selecting a random 36 students with an average age sample of n greater than 23? c. For a sample of n = 36 students, what is the prob- ability that the average age is between 21 and 22?

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