Question
According to a recent report, people smile an average of m = 62 times per day. Assuming that the distribution of smiles is approximately normal
According to a recent report, people smile an average of m = 62 times per day. Assuming that the distribution of smiles is approximately normal with a standard deviation of o = 18, find each of the following values. Show all work.
a. What proportion of people smile more than 80 times a day?
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Essentials Of Statistics For The Behavioral Sciences
Authors: Frederick J Gravetter, Larry B. Wallnau
8th Edition
1133956572, 978-1133956570
