Question
Assume that among the population it takes an average of 90 minutes to finish a certain hike. Further assume that the population standard deviation is
Assume that among the population it takes an average of 90 minutes to finish a certain hike. Further assume that the population standard deviation is 25 minutes.
a) What's the probability that a simple random sample of 20 individuals will provide a sample mean within 10 minutes of the population average?
b) What's the probability that a simple random sample of 30 individuals will provide a sample mean within 10 minutes of the population average?
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Introductory Algebra
Authors: Alan S Tussy, Rosemary Karr, Marilyn Massey, Diane Koenig, R David Gustafson
5th Edition
1305161866, 9781305161863
