Statistics Homework Solutions
#7307
Probability and sample mean
PVC pipe is manufactured with a mean diameter of 1.01 inches and a standard deviation of 0.003 inches. What is the probability that a random sample of 9 sections of pipe will have a sample mean diameter between 1.009 inches and 1.012 inches? Assume the central limit theorem holds.
Mulitple choice answers:
a) 15.9%
b) 37.8%
c) 81.9%
d) 99.8%
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