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A weather forecaster has constructed the following contingency table to investigate how often his predictions of rain in the previous three months were correct. Use
A weather forecaster has constructed the following contingency table to investigate how often his predictions of rain in the previous three months were correct. Use the next table to answer the three following questions
Predicted rain | Predicted no rain | Total | |
No rain | 23 | 6 | 29 |
Rain | 3 | 5 | 8 |
Total | 26 | 11 | 37 |
One prediction is selected at random. Let A be the event that the forecaster predicted rain, and let B the event that is No rain.
6. What is P (A)? | A 0.62 | B 0.70 | C 0.79 | D 0.88 |
7.What is P (A B)? | A 0.88 | b 0.60 | C 0.62 | D 0.70 |
8.What is P (A | B)? | A 0.16 | B 0.38 | C 0.39 | D 0.79 |
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