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Chapter 8 Under what circumstances is a t-test used instead of a z-test for a hypothesis...

Chapter 8

Under what circumstances is a t-test used instead of a z-test for a hypothesis test?

What is an estimated standard error of the mean (sX ) ?

Explain what is meant by a confidence interval.

Explain why interval estimations are preferable to point estimations when estimating population parameters.

Math   Statistics-And-Probability   
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