Mathematics

Mathematics, 05.03.2020 05:09, emilyleighty07

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.6. (Round your answers to four decimal places.) (a) If the distribution is normal, what is the probability that the sample mean hardness for a random sample of 11 pins is at least 51?

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