During the past six months, 73.2 percent of U.S. households purchased sugar. Assume that these expenditures are approximately normally distributed with a mean of $8.22 and a standard deviation of $1.10. Eighty percent of the households spent more than what amount?
A) $7.30
B) $7.38
C) $9.06
D) $9.14

Question

Quizplus · Accepted Answer

z_.20 = −.84 = (x − 8.22)/1.10 x − 8.22= −.924 x = 8.22 − .924 = 7.296

During the Past Six Months, 73