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