Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 135 135 millimeters, and a variance of 64 64 . If a random sample of 46 46 steel bolts is selected, what is the probability that the sam
ple mean would be greater than 137.2 137.2 millimeters? Round your answer to four decimal places.
Refer Standard normal table/Z-table to find the probability or use excel formula "=NORM.S.DIST(1.8651, TRUE)" to find the probability.
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