In the United States the ages 13 to 55+ of smartphone users approximately follow a normal distribution with approximate mean and standard deviation of 36.9 years and 13.9 years respectively. Using this information, answer the following questions. What probability of cell phone users are between 40 and 49 years old? A) P(40 < x < 49) = 0.2197 B) P(40 < x < 49) = 0.5882 C) P(40 < x < 49) = 0.4118 D) P(40 < x < 49) = 0.8080
In the United States the ages 13 to 55+ of smartphone users approximately follow a normal distribution with approximate mean and standard deviation of 36.9 years and 13.9 years respectively. Using this information, answer the following questions. What probability of cell phone users are between 40 and 49 years old? A) P(40 < x < 49) = 0.2197 B) P(40 < x < 49) = 0.5882 C) P(40 < x < 49) = 0.4118 D) P(40 < x < 49) = 0.8080
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Transcribed Image Text:In the United States the ages 13 to 55+ of smartphone users
approximately follow a normal distribution with approximate mean and
standard deviation of 36.9 years and 13.9 years respectively. Using this
information, answer the following questions.
What probability of cell phone users are between 40 and 49 years old?
A) P(40 < x < 49) = 0.2197
B) P(40 < x < 49) = 0.5882
C) P(40 < x < 49) = 0.4118
D) P(40 < x < 49) = 0.8080
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