Question

As mentioned in Exercise 7.33, among college students who hold part-time jobs during the school year, the distribution of the time spent working per week is approximately normally distributed with a mean of 20.20 hours and a standard deviation of 2.60 hours. Find the probability that the average time spent working per week for 18 randomly selected college students who hold part-time jobs during the school year is
a. Not within 1 hour of the population mean
b. 20 to 20.50 hours
c. At least 22 hours
d. No more than 21 hours


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  • CreatedAugust 25, 2015
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