Center and Spread
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Objective
I can compare and contrast different measures of center and spread to describe the distribution of a data set.
Part 1 of 3
Warm-up video
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We don't generate video — this one is by CrashCourse on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 3
Practice
7 questions
Define "range" and "interquartile range (IQR)" in the context of data sets. Explain how they differ in what they tell you about the spread of the data.
Calculate the interquartile range (IQR) of the following data set: 12, 15, 18, 20, 22, 25, 28, 30, 35.
Part 3 of 3
Exit ticket
Quick comprehension check
“Explain how the range and interquartile range (IQR) provide different information about the spread of a dataset. In what situations would the IQR be a more useful measure of spread than the range? Describe how variance and standard deviation are related. Why is standard deviation often preferred for describing the spread of a dataset, even though variance is used in its calculation?”
Sample answer included in the free materials
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