# CONFIDENCE INTERVALS FOR THE DIFFERENCE BETWEEN TWO MEANS

### Lesson 11

This is a Socratic lesson, starting with a teacher led discussion on developing inferences about the difference between the means of two populations. Students will find the familiar theme of confidence intervals being determined by sample parameters and margin of errors. The second part of the lesson has a real-life example ending with the question “Why would advertisers care about this information?” that students themselves should answer and discuss. The Classroom Investigation is the third part of the lesson and contains real data. This part introduces a profession that pays very well and involves statistics along with marketing, communications, psychology and the arts.

### Teacher Materials

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