Education Technology

Population Mean: σ unknown

Activity Overview

Students calculate confidence intervals to estimate the true population mean when the standard deviation of the population is not known.

Key Steps

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    Students will be introduced to the assumptions needed to use the t distribution. They will investigate, by graphing, the relationship between a normal distribution and the t distribution.

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    Students are presented with a problem to calculate a confidence interval. They will use a Calculator page to compute the interval, finding the t-value and the error.

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    As an extension, students are given a data set and asked to construct three confidence intervals. They will be able to use either method from the activity.