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According to a marketing website, adults in a certain country average 61 minutes per day on...

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Statistics

According to a marketing website, adults in a certain countryaverage 61 minutes per day on mobile devices this year. Assume thatminutes per day on mobile devices follow the normal distributionand has a standard deviation of 11 minutes. Complete parts athrough d below.

a. What is the probability that the amount oftime spent today on mobile devices by an adult is less than 70

minutes?

(Round to four decimal places as needed.)

b. What is the probability that the amount oftime spent today on mobile devices by an adult is more than 50

minutes?

(Round to four decimal places as needed.)

c. What is the probability that the amount oftime spent today on mobile devices by an adult is between 40and56

minutes?

(Round to four decimal places as needed.)

d. What amount of time spent today on mobiledevices by an adult represents the 60th percentile?

An amount of time of minutes represents the 60th percentile.

Answer & Explanation Solved by verified expert
3.9 Ratings (513 Votes)
Solution Given that mean 61standard deviation 11aPx 70 Px 70 61 11 Pz    See Answer
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