In a recent year, about two-thirds of U.S. households purchasedground coffee. Consider the annual ground coffee expenditures forhouseholds purchasing ground coffee, assuming that theseexpenditures are approximately distributed as a normal randomvariable with a mean of $75 and a standard deviation of $10.
a. Find the probability that a household spent less than$65.00.
b. Find the probability that a household spent more than$80.00.
c. What proportion of the households spent between $65.00 and$80.00?
d. 99% of the households spent less than what amount?
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