Topic: Unit 4: Inference for Quantitative Data: Means

Choosing Between Mean and Proportion Procedures

Writing the Full Two-Sample t Test Solution

Worked Example: Interval for Two Group Means

Worked Example: One-Sided Test for Two Means

Why a t Test Never Proves the Null Mean

Type II Error in a Test About Means

Type I Error in a Test About Means

The Two-Sample t Test Statistic

The Significance Level Alpha Explained

Reading the Sign of the Interval for a Difference