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14 cards from this deck
A running total of frequencies as you move through each group
Total frequency accumulated so far, not individual frequencies
Each value must be larger than the previous one
Highest value (upper boundary) from each class interval
Cumulative frequency
Upper boundary of each class interval
Draw a smooth curve, never straight lines
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\text{Upper quartile} - \text{Lower quartile}Upper quartile−Lower quartile
The spread of the middle 50% of the data
Go up vertically to curve, then read across horizontally
Go across horizontally to curve, then read down vertically
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