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12 cards from this deck
Value below which ppp% of data falls
25th percentile
25%
Median or 50th percentile
75%
100
Arrange data in ascending order
P=p100×(n+1)P = \frac{p}{100} \times (n + 1)P=100p×(n+1)
Position of percentile in ordered data
Desired percentile (e.g., 25 for 25th)
Number of data points
Average the two closest data points
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