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You test 75 people for the number of times they could bounce a ping pong ball on a paddle in 60 seconds. You calculate the

You test 75 people for the number of times they could bounce a ping pong ball on a paddle in 60 seconds. You calculate the mean of your sample to be 30 bounces with a standard deviation of 13 bounces. Show your work:

a.What is the standard error of the mean?

b.What would be the 95% confidence interval of the predicted ping-pong ball bounces in a population?

c.If you wanted to compute the 78% confidence interval of population mean, what value would you use for Z in your equation?

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