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Stat Chapter 5

Understanding and Comparing Distributions

Boxplot Displays Five Number Summary. Central box with whiskers that extend to the non-outlying data values. Useful for comparing groups and displaying outliers.
Lower Fence (Outlier) Q1 - 1.5(IQR) Any datum below is lower outlier.
Upper Fence (Outlier) Q3 + 1.5(IQR) Any datum below is upper outlier.
Far Lower Outlier Any datum below Q1 - 3(IQR)
Far Upper Outlier Any datum above Q3 + 3(IQR)
When COMPARING DISTRIBUTIONS consider their: Shape, center, outliers, and spread.
When COMPARING BOXPLOTS consider their: Shape, median, IQR, variation, outliers.
Timeplot Displays data that change over time. Successive values are usually connected with lines to show trends more clearly. Smooth curves can be added to show long-term patterns and trends.
Created by: emmaherbach