b:head_first_statistics:calculating_probability
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| Both sides previous revisionPrevious revision | |||
| b:head_first_statistics:calculating_probability [2025/09/15 07:52] – [probability of A given B] hkimscil | b:head_first_statistics:calculating_probability [2025/09/15 08:06] (current) – [Probability magnet] hkimscil | ||
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| Duncan’s Donuts are looking into the probabilities of their customers buying donuts and coffee. They drew up a probability tree to show the probabilities, | Duncan’s Donuts are looking into the probabilities of their customers buying donuts and coffee. They drew up a probability tree to show the probabilities, | ||
| * P(Donuts) = 3/4 | * P(Donuts) = 3/4 | ||
| - | * P(Coffee | Donuts') = 1/3 | + | * P(Coffee | ㄴDonuts) = 1/3 |
| * P(Donuts ∩ Coffee) = 9/20 | * P(Donuts ∩ Coffee) = 9/20 | ||
| < | < | ||
| Line 176: | Line 176: | ||
| P(c) = 54/120 + 10/120 = 64/120 = 16/30 = 8/15 | P(c) = 54/120 + 10/120 = 64/120 = 16/30 = 8/15 | ||
| - | c (8/15) -- d [j] | + | c (8/15) -- d [j] [P(d and c) = 9/20] |
| -- ~d | -- ~d | ||
| ~c (7/ | ~c (7/ | ||
| + | |||
| j = p(d | c) | j = p(d | c) | ||
| p(d and c) = 9/20 이므로 | p(d and c) = 9/20 이므로 | ||
b/head_first_statistics/calculating_probability.txt · Last modified: 2025/09/15 08:06 by hkimscil