The manager of a local gym has determined that the length of time patrons spend at the gym is a normally distributed variable with a mean of 80 minutes and a standard deviation of 20 minutes. (a) What is the least amount of time spent by 60% of patrons at the gym? (b) What proportion of patrons spend more than two hours at the gym? (c) What proportion of patrons spend less than one hour at the gym?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.3: Measures Of Spread
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The manager of a local gym has determined that the length of time patrons spend at
the gym is a normally distributed variable with a mean of 80 minutes and a standard
deviation of 20 minutes.

(a) What is the least amount of time spent by 60% of patrons at the gym?
(b) What proportion of patrons spend more than two hours at the gym?
(c) What proportion of patrons spend less than one hour at the gym?

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