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a factory makes parts for laptop computers, including screws. the screws are required to have the right length. the length of the screws obey a
a factory makes parts for laptop computers, including screws. the screws are required to have the right length. the length of the screws obey a normal distribution with mean u=4.25 millimeters and standard deviation o=0.022 millimeters
suppose a simple random sample of n=20 screws is selected. Calculate the probability that their mean length is between 4.243mm and 4.257mm.
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