pdf Exit Ticket - Outliers

This exit ticket provides a focused formative assessment on outliers and their impact on measures of center. Students are asked to define an outlier and explain how it affects the mean of a data set. They must support their explanation with a specific example, encouraging deeper reasoning rather than simple memorization.

Because students are required to describe how an extreme value can shift the mean and make it less representative of the majority of the data, this prompt reinforces conceptual understanding of variability and central tendency. The open-response format allows teachers to quickly gauge whether students understand why the median is sometimes a more reliable summary measure when outliers are present.

This resource works well as a “ticket out the door,” quick check for understanding, discussion starter, or formative assessment within a statistics and data analysis unit.

Skills Assessed

• Defining and identifying outliers

• Explaining the effect of outliers on the mean

• Comparing mean and median conceptually

• Constructing mathematical explanations with examples

• Demonstrating conceptual understanding of data sets

Details

• 2 pages

• Answer key not included (teacher guidance / sample response notes provided)

ID# 0412