NATS 1500 Lecture Notes - Lecture 25: Gambling, G Girls, Miscarriage
4 Oct 2016
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They are used to solve questions containing probability: p (a) = 1 p(ac, p (aub) = p(a) + p(b) p (knb) = p(a) + p (b) if a and b are mutually exclusive (special case: p (a n b) = p(a) p(b|a) a. b. = p (a) p(b) if a and b are independent. If you can prove p(anb) = p(a) p(b) if a and b are independent (special case) If you"re about to show this p (a|b) = p (a) p(b) that this is true, then that implies independence. There is another formula you"ll be looking at, but won"t be required to memorize: bayes formula. For 9th graders, 22% of the boys and 4. 5% of the girls admitted they gambled at least once a week during the previous year. The population consisted of 50. 9% girls and 49. 1% boys. About 11% of all 9th graders are males and weekly gamblers.
