Assume that a population is normally distributed with a mean of 100
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15.
Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not? What is a good way to see where this score falls? Remember, a data value is unusual if it falls beyond 2 standard deviations from the mean.
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