A Nielsen study indicates that people between the age of 18 and 34 spend a mean of 300 minutes watching video on their smartphones per week. Assume that the amount of time watching video on a smartphone per week is normally distributed with a standard deviation of 40 minutes. Given this data, what is the probability that a person between the age of 18 and 34 spends less than 4.5 hours watching video on his/her smartphone per week? Create a professional drawing that illustrates your answer.
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A Nielsen study indicates that 18- to 34-year-olds spend a mean of 93 minutes watching video on their smartphones per week. Assume that the amount of time watching video on a smartphone per week is normally distributed and that the standard deviation is 15 minutes. What is the probability that an 18- to 34-year-old spends less than 60 minutes or more than 77 minutes watching video on his or her smartphone per week? (Round final answer to four decimal places)
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A Nielsen study indicates that 18- to 34-year olds spend a mean of 93 minutes watching video on their smartphones per week. Assume that the amount of time watching video on a smartphone per week is normally distributed and that the standard deviation is 15 minutes. A. What is the probability that an 18- to 34-year-old spends less than 77 minutes watching video on his or her smartphone per week?
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