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10 cards from this deck
Empirical rule
Approximately 68%
Approximately 95%
Approximately 99.7%
Z-score or standardised score
Value falls below the mean
Probabilities must sum to 1 (or 100%)
Equal areas appear on both sides of the mean
Cumulative probabilities for different z-scores
Use complement rule: 100%−P(Z≤a)100\% - P(Z \leq a)100%−P(Z≤a)
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