Statistics
Activity:
Population Mean: Standard Deviation Unknown
Posted on Mar 4, 2010
Topic: Inferential Statistics
Students calculate confidence intervals to estimate the true population mean when the standard deviation of the population is not known.
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Activity Key Steps:
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. Self-check questions allow students to verify their understanding of the material.
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. Then the teacher will lead students in learning how to use the t Interval command for a second method of finding the interval.
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.