Mathematics, 23.10.2019 04:00 davidoj13

There are approximately one billion smartphone users in the world today. in the united states, the ages of smartphone users between 13 to 55 approximately follow a normal distribution with approximate mean and standard deviation of 37 years and 8 years, respectively. using the 68-95-99.7 rule, what percent of smartphone users are between the ages of 29 and 45?

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There are approximately one billion smartphone users in the world today. in the united states, the a...