AP Statistics / Unit 1: Exploring One-Variable Data and Collecting Data
1.8 Graphical Representations of Summary Statistics for One Quantitative Variable
Notes
A boxplot shows the five-number summary: min, $Q_1$, median, $Q_3$, max, with outliers marked separately.
- The box covers the middle 50% (the IQR).
Practice
The box in a boxplot covers:
From $Q_1$ to $Q_3$.
Which can't be found from a boxplot?
Boxplots show quartiles, not the mean.
About what percent of data lie above $Q_3$?
$Q_3$ is the 75th percentile.
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