Question
9. Suppose that a random sample is being drawn from the population of executives known to have a mean age of 30 with a standard
9. Suppose that a random sample is being drawn from the population of executives known to have a mean age of 30 with a standard deviation of 3 years. The population is normally distributed. a) What is the probability that a randomly selected executive will be over 35 years of age? b) What is the probability, in a sample of 365 executives, that the mean age will exceed 35 years?
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Statistical Techniques in Business and Economics
Authors: Douglas A. Lind, William G Marchal
17th edition
1259666360, 978-1259666360
