BSC 340 Lecture Notes - Lecture 16: Bluegill, Walleye, Conditional Probability
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13 Nov 2018
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In class we focused on the probability and decision making worksheets. More explanation will be in the notes for november 13. You are going fishing at an alabama reservoir. The reservoir is managed for recreational fishing of bass, bluegill, shad, and walleye. You have a topwater lure and a crankbait lure. Pr(a or b) = pr(b u a) = pr(a) + pr(b) - pr(cid:894)b a(cid:895) = pr(a) * pr(b) if a&b are independent. = pr(cid:894)b a(cid:895) = pr(cid:894)b | a(cid:895) * pr(cid:894)a(cid:895) if a a(cid:374)d b are not i(cid:374)depe(cid:374)de(cid:374)t. Pr(cid:894)b | a(cid:895) = pr(cid:894)b a(cid:895) / pr(cid:894)a(cid:895) 0. 2+0. 5-0. 15 = 0. 55: the sex ratio in the bluegill population is 55% female and 45% male. Males and females have the same chance of getting caught. 0. 45*0. 5 = 0. 225: suppose the topwater lure feels the sa(cid:373)e as the (cid:272)ra(cid:374)k(cid:271)ait lure, so you do(cid:374)"t te(cid:374)d to grab one more than the other out of your bag.