Mathematics, 10.08.2021 01:50 nyny679
Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.2. If the distribution is normal, what is the probability that the sample mean hardness for a random sample of 9 pins is at least 51?
Answers: 3
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Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard devia...
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