Question

Refer to Exercise 7.94. The current distribution of all monthly cable bills in the United States is approximately normal with a mean of $82.69 and a standard deviation of $11.17. Find the probability that the average monthly cable bill for 23 U.S. households with cable is
a. Less than $80
b. Between $75 and $85
c. Within $5 of the population mean
d. More than $90


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  • CreatedAugust 25, 2015
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