Hypothesis testing - Making and using hypothesis

3 important questions on Hypothesis testing - Making and using hypothesis

What is a good null hypothesis?

A statement that is interesting to reject.

Every H0 is paired with a HA, what does the HA represent?

The HA represents all other possible parameter values ecvept that stated in the H0.

How is the mismatch between data and a null hypothesis calculated?

Calculate the chance of getting those data, or data that are even more different from expected, while assuming the H0.

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