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USPshnik [31]
3 years ago
13

During the past six months, 73.2% of US households purchased sugar. Assume that these expenditures are approximately normally di

stributed with a mean of $8.22 and a standard deviation of $1.10. 99% of the households spent less than what amount?
Business
1 answer:
Tatiana [17]3 years ago
3 0

Answer:

Explanation:

Given X~Normal(mean=8.22, s=1.1)

So P(5<X<9) = P((5-8.22)/1.1 <(X-mean)/s < (9-8.22)/1.1)

=P(-2.93<Z< 0.71)

=0.7595 (check standard normal table)

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