A survey was conducted to measure the number of hours adults spend sleeping each week. In the survey, the number of hours was normally distributed, with an average of 7 hours and a standard deviation of 1 hour. One adult was chosen at random. Which of the alternatives below corresponds to the probability that this participant will spend more than 10 hours a week sleeping?   a) 0,9987% b) 13% c) 99,87% d) 0,13%

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A survey was conducted to measure the number of hours adults spend sleeping each week. In the survey, the number of hours was normally distributed, with an average of 7 hours and a standard deviation of 1 hour. One adult was chosen at random. Which of the alternatives below corresponds to the probability that this participant will spend more than 10 hours a week sleeping?

 

a) 0,9987%

b) 13%

c) 99,87%

d) 0,13%

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