**Lab Activity #8 – Hypothesis Testing**

Name ___________________________________________

State a null and a two-tail research hypothesis for a study exploring the possible effect that security level of a prison has on assault rates.

Null Hypothesis:

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Research Hypothesis:

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State a null and a one-tail research hypothesis for a study exploring the possible effect that exercise has on weight loss.

Null Hypothesis:

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Research Hypothesis:

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A woman tests positive for COVID-19. A few days later, her doctor tells her that her test is false, and she is negative for COVID-19. What type of error was committed?

- Type I error
- Type II error

A woman tests negative for COVID-19. A few days later, her doctor tells her that her test is false, and she is positive for COVID-19. What type of error was committed?

- Type I error
- Type II error

Graph the appropriate critical region below for a two-tail hypothesis test set at an alpha of .05.

Graph the appropriate critical region below for a one-tail hypothesis test set at an alpha of .001 (note: For this exercise, the direction of the tail does not matter).

Graph the appropriate critical region below for a two-tail hypothesis test set at an alpha of .01.