A large population of male college students had a nightly sleep time on Monday through Thursday that is normally distributed with a mean of 6.1 hours and a standard deviation of 19 hours. Please show the following answers to 4 decimal places. al it one of these students is selected at random, what is the probability that he has a mean sleep time less than 7 hours? bịif a sample of 30 of these students is chosen, what is the probability that their mean sleep time is less than 7 hours?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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A large population of male college students had a nightly sleep time on Monday through Thursday that is normally distributed with a mean of 6.1 hours and a standard
deviation of 1.9 hours. Please show the following answers to 4 decimal places.
a) If one of these students is selected at random, what is the probability that he has a mean sleep time less than 7 hours?
b) if a sample of 30 of these students is chosen, what is the probability that their mean sleep time is less than 7 hours?
Transcribed Image Text:A large population of male college students had a nightly sleep time on Monday through Thursday that is normally distributed with a mean of 6.1 hours and a standard deviation of 1.9 hours. Please show the following answers to 4 decimal places. a) If one of these students is selected at random, what is the probability that he has a mean sleep time less than 7 hours? b) if a sample of 30 of these students is chosen, what is the probability that their mean sleep time is less than 7 hours?
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