Based on a smartphone​ survey, assume that 57​% of adults with smartphones use them in theaters. In a separate survey of 264 adults with​ smartphones, it is found that 149 use them in theaters. a. If the57% rate is​ correct, find the probability of getting 149 or fewer smartphone owners who use them in theaters. b. Is the result of 149 significantly​ low?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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Based on a smartphone​ survey, assume that 57​% of adults with smartphones use them in theaters. In a separate survey of 264 adults with​ smartphones, it is found that 149 use them in theaters.

a. If the57% rate is​ correct, find the probability of getting 149 or fewer smartphone owners who use them in theaters.
b. Is the result of 149 significantly​ low?
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