Back to Compare center and spread of data sets — Problem 4 · Task Set 2
Exercises: Comparing Center and Spread of Data Sets
Work through each section in order. Report center and spread as matched pairs: mean travels with standard deviation (SD), median travels with the interquartile range (IQR). Choose the pair by the SHAPE of the data first: roughly symmetric uses mean/SD; skewed or outlier-laden uses median/IQR. A complete comparison of two or more sets states a center finding AND a spread finding. Round SD to two decimal places unless told otherwise.
Grade 9·21 problems·~35 min·Common Core Math - HS Statistics and Probability·group·hss-id-a-2
Work through problems with immediate feedback
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Fluency Practice
Compute each statistic. Keep mean with SD and median with IQR.
1.
The dot plot below shows the number of books students read over the summer. Describe the shape (roughly symmetric, or skewed/outlier-laden), then name the matched pair of statistics — center and spread — you would report for this data.