Back to Compare center and spread of data sets — Problem 2 · 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.
A second set is . Its mean is also . Without the long computation, which set is MORE spread out: this one or ? Then state the larger standard deviation rounded to two decimals (it is for one set and for the other). Enter only the larger SD.