STAB22H3 Lecture 18: STAB22 - Lecture 18 - Continuation of Ch. 13 and beginning of CH. 14
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STAB22H3 Full Course Notes
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371: two events a and b are independent if p(b|a) = p(b, easier definition: a and b are independent if p(a and b) = p(a) x p(b) multiplication rule. 372: p(a and b) = p(a) x p(b|a, p(a and b) = p(b) x p(a|b, example: 800: r1 event 1st one rejected, r2 event 2nd one rejected, randomly select two male applicants to law school. What is probability that they are both rejected: p(r1 & r2) = p(r1) x p(r2|r1) (90/100) x (89/99) = 0. 809. At least one: example problem, 20% of the children in a country under 6 years of age live below the official poverty level. If we select two children at random, what is the probability that. Both are below the official poverty level: p(p1 & p2) = p(p1) x p(p2) = 0. 20 x 0. 20 = 0. 04. Neither is below the official poverty level: p(p1c & p2c) = p(p1c) x p(p2c) = 0. 64.
