Based on a smartphone survey, assume that 57% of adults with smartphones use them in theaters. In a separate survey of 216 adults with smartphones, it is found that 121 use them in theaters. a. If the 57% rate is correct, find the probability of getting 121 or fewer smartphone owners who use them in theaters. b. Is the result of 121 significantly low?
Based on a smartphone survey, assume that 57% of adults with smartphones use them in theaters. In a separate survey of 216 adults with smartphones, it is found that 121 use them in theaters. a. If the 57% rate is correct, find the probability of getting 121 or fewer smartphone owners who use them in theaters. b. Is the result of 121 significantly low?
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
216
adults with smartphones, it is found that
121
use them in theaters.a. If the
57%
rate is correct, find the probability of getting
121
or fewer smartphone owners who use them in theaters.b. Is the result of
121
significantly low?Expert Solution
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