Unit 2: Statistics

Ask questions with variability and read displays carefully.

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1. 2-1 Statistical questionsIdentify a question that anticipates variability.
2. 2-2 Describe a data setFind the range of a data set.
3. 2-3 Dot plotsCount observations on a dot plot.
4. 2-4 HistogramsRead frequencies from bar heights.
5. 2-5 MeanCompute a mean as an equal share of the total.
6. 2-6 MedianFind the median of an ordered odd-numbered list.
7. 2-7 Mean absolute deviationCompute a mean absolute deviation for a symmetric set.
8. 2-8 Box plots and IQRFind the interquartile range from a five-number summary.
9. 2-9 Choose a displayMatch a numerical distribution to a dot plot.
10. 2-10 Interpret a displayAnswer a question by counting observations, not axis labels.
11. 2-11 Misleading displaysReject a comparison that ignores a truncated axis.
12. 2-12 A statistical investigationSummarize a data set with the mean and keep the claim tied to it.