Asked by rose
Use the Empirical Rule to answer each question.
During 1 week an overnight delivery company found that the weights of its parcels were normally distributed, with a mean of 16 ounces and a standard deviation of 4 ounces.
(a) What percent of the parcels weighed between 8 ounces and 20 ounces? (Round your answer to one decimal place.)
(b) What percent of the parcels weighed more than 28 ounces? (Round your answer to two decimal places.)
Answers
Answered by
oobleck
8 = µ-2σ
20 = µ+1σ
So what does your Z table say?
20 = µ+1σ
So what does your Z table say?
Answered by
Tricia mae
A. 13.5% + 34% + 34%
= 81.5%
B. (100% - 99.7%) / 2
=0.15%
= 81.5%
B. (100% - 99.7%) / 2
=0.15%
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