# DERIVING CONFIDENCE INTERVALS FOR A MEAN

### Lesson 7

This is a Socratic lesson designed to compute confidence intervals for the mean of a population. Students will find the familiar theme of the confidence interval being determined by the sample parameter and the margin of error already seen in the previous lessons of this unit. An important difference is explained in detail and demonstrated in the Classroom Investigation 7.7: when the sample size is n<30, the Student t-distribution must be used to compute critical values.

### Teacher Materials

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