What are the mean-variance and standard deviation

Reference no: EM1391835

What are the mean, variance, and standard deviation?

How are they useful? What is a normal distribution?

How is it useful?

A population is normally distributed with the mean of 100 and a standard deviation of Would it be unusual for mean of sample of 3 to be 115 or more? Why or why not?

Reference no: EM1391835

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