Boxplot & Outlier Visualizer – AP Statistics

1. The IQR measures:

The range of all data The middle 50% of data (Q3 − Q1) The distance from mean to median The standard deviation

2. A data point is an outlier if it is:

More than 1 σ from the mean Beyond Q1−1.5·IQR or Q3+1.5·IQR Below the median More than 2× the range

3. In a right-skewed distribution, typically:

Mean < Median Mean = Median Mean > Median Mean = 0