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Slide 1

A P-Value is a Conditional Probability

A p-value is a conditional probability. You've seen this before when you learned about hypothesis tests for a single population proportion. 

The good news is that the logic doesn't change when we test for a difference in two population proportions!

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A normal curve shows a p-value as a shaded area under the curve

A P-Value is a Conditional Probability

Recall the Four Steps of Hypothesis Testing

Fill in the blanks to complete the four steps of hypothesis testing.

Step 1. Determine the

Step 2: Collect the

Step 3; Assess the (this is where the p-value comes in)

Step 4: State a (using the p-value)

a graph shows a bell-shaped distribution of sample statistics with some in the right tail shaded