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12 questions from this quiz
A running total of frequencies
Add current frequency to all above it
Each must be larger than previous one
The upper boundary
With a smooth curve
12×total frequency\frac{1}{2} \times \text{total frequency}21×total frequency
14×total frequency\frac{1}{4} \times \text{total frequency}41×total frequency
34×total frequency\frac{3}{4} \times \text{total frequency}43×total frequency
Upper quartile - Lower quartile
Spread of middle 50% of data
Not affected by outliers
Horizontally to the curve
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