22a) 13.7%
22b) 31.9"
22c) What's shape? ______
What's the mean? _____
What's the sd? ______ (hint: something divided by the square root of something)
22d) 0.005
24a) skewed right--you can't stay for less than zero and a few people will stay a long time.
24b) The CLT will guarantee normality for large sample sizes. For individuals, we don't have a clue how to calculate probabilities for skewed distributions.
28a) 4.78%
28b) (1 - 0.0478)^3 = 0.863
28c) Like 22c above...
28d) Basically zero
