Math

StatisticsEssentials of Statistics for the Behavioral SciencesAccording to a recent, people smile an average of μ = 62 time per day. Assuming that the distribution of smiles is approximately normal with a standard deviation of σ = 18, find each of the following values. a. What proportion of people smile more than 80 times a day? b. What proportion of people smile at least 50 times a day?BuyFind*launch*

8th Edition

Frederick J Gravetter + 1 other

Publisher: Cengage Learning

ISBN: 9781133956570

Chapter 6, Problem 16P

Textbook Problem

According to a recent, people smile an average of μ = 62 time per day. Assuming that the distribution of smiles is approximately normal with a standard deviation of σ = 18, find each of the following values.

- a. What proportion of people smile more than 80 times a day?
- b. What proportion of people smile at least 50 times a day?

Essentials of Statistics for the Behavioral Sciences

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