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The height of the five starting players of a Basket-Ball team are(in inches) 68, 72, 75,...

The height of the five starting players of a Basket-Ball team are(in inches)
68, 72, 75, 80, and 84.
a.) Find the population mean.
b.)Show that the mean of all the sample means of size 3 is equal to the population mean.
Math   Statistics-And-Probability   
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