Skewness Explorer

Interactive GCSE Statistics tool for exploring and identifying symmetrical, positive, and negative skew.

Identify the Skew!

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The Skew Cheat Sheet

Symmetrical

Perfect mirror-image. Bell curve.
Mean = Median = Mode

Positive (Right) Skew

Tail points to the high/right numbers.
Mode < Median < Mean

Negative (Left) Skew

Tail points to the low/left numbers.
Mean < Median < Mode

Representation Style
Frequency
Mean
Median
Mode
Interactive Metric Relationship
Model a Distribution
Pearson's Coefficient of Skewness:
$$\frac{3(\text{Mean} - \text{Median})}{\text{Standard Deviation}}$$

Study Tip

Look closely at where the long "tail" of the graph is pointing, rather than where the highest concentration of bars are.