There Are Approximately One Billion Smartphone Users In The World Today.

There are approximately one billion smartphone users in the world today. 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.a. Determine the probability that a random smartphone user in the age range 13 to 55+ is between 23 and 64.7 years old.

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There are approximately one billion smartphone users in the world today.

Question
There are approximately one billion smartphone users in the world today. 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.

a. Determine the probability that a random smartphone user in the age range 13 to 55+ is between 23 and 64.7 years old.

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