Mathematics, 19.10.2021 18:40 heintzelmanvp6ir6d
6.7 In a recent year, about two-thirds of US. households
purchased ground coffee. Consider the annual ground cof-
fee expenditures for households purchasing ground coffee,
assuming that these expenditures are approximately dis-
tributed as a normal random variable with a mean of
$45.16 and a standard deviation of $10.00.
a. Find the probability that a household spent less than $ 25.00
b. Find the probability that a household spent more than
$50.00
c. What proportion of the households spent between
$30.00 and $40.00?
d. 99% of the households spent less than what amount?
Answers: 2
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6.7 In a recent year, about two-thirds of US. households
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