S-ID.A. Summarize, represent, and interpret data on a single count or measurement variable

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S-ID.A.1. Represent data with plots on the real number line (dot plots, histograms, and box plots).

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S-ID.A.2. Use statistics appropriate to the shape of the data distribution to compare center (median, mean) and spread (interquartile range, standard deviation) of two or more different data sets.

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S-ID.A.3. Interpret differences in shape, center, and spread in the context of the data sets, accounting for possible effects of extreme data points (outliers).

• Describing Data Sets with Outliers
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• Identifying Outliers
• Measuring Variability in a Data Set
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S-ID.A.4. Use the mean and standard deviation of a data set to fit it to a normal distribution and to estimate population percentages. Recognize that there are data sets for which such a procedure is not appropriate. Use calculators, spreadsheets, and tables to estimate areas under the normal curve.

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