Mathematics, 22.07.2020 23:01 Matildagann

A random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph. From past information, it is known that the standard deviation of the population is 22 mph. The standard error of the mean is

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A random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph. Fro...