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Stat Chapter 5
Understanding and Comparing Distributions
Word | Definition |
---|---|
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. |