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## AP®︎/College Statistics

### Course: AP®︎/College Statistics>Unit 11

Lesson 5: Testing for the difference of two population means

# Conclusion for a two-sample t test using a P-value

Given results of a two-sample t test, compare the P-value to the significance level to make a conclusion in context about the difference between two means.

## Want to join the conversation?

• Can someone explain to me why the DF is 197? I thought it was 99 variables + 99 variables would be 198?
• I think its not conservative df its that one which is calculated by complicated formula
(1 vote)
• How come p-Value is 0.13
According to the null hypothesis, it is a two-tailed test. As it is a two-tailed test, the area of rejection falls both sides of the distribution. Shouldn't it be multiplied by 2 to get the actual p-value which is 0.26?