Based on a smartphone​ survey, assume that   42​% of adults with smartphones use them in theaters. In a separate survey of   241 adults with​ smartphones, it is found that   98 use them in theaters. a. If the   42​% rate is​ correct, find the probability of getting   98 or fewer smartphone owners who use them in theaters. b. Is the result of   98 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

 

42​% of adults with smartphones use them in theaters. In a separate survey of

 

241 adults with​ smartphones, it is found that

 

98 use them in theaters.

a. If the

 

42​% rate is​ correct, find the probability of getting

 

98 or fewer smartphone owners who use them in theaters.

b. Is the result of

 

98 significantly​ low?

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