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Mathematics, 25.11.2021 14:10 maylindominguez

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.4. (Round your answers to four decimal places.) A button hyperlink to the SALT program that reads: Use SALT. (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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