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Probability and statistics

Probability & Statistics What is probability?Probability measures how likely something is to happen, on a scale from 0 (impossible) to 1 (certain). For an event where every outcome is equally likely, the probability of something happening is: (number of outcomes where it happens) ÷ (total number of possible outcomes).A basic calculation: rolling a dieA standard die has 6 faces, each equally likely. The probability of rolling a 4 is 1 ÷ 6, since only one of the six faces shows a 4. The probability of rolling an even number is 3 ÷ 6 = 1/2, since three faces (2, 4, 6) count as even out of six total.…

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