標題: 急急急! ... 2 distribution problems ...>< [打印本頁] 作者: 阿寧 時間: 2009-2-12 15:44 標題: 急急急! ... 2 distribution problems ...><
急急急! ... 2 distribution problems ...><
1) mean = 10
standard deviation = 0.2
..what is the probability of less than 10? i got 0...but the prof said the answer is not 0.....
2) the average casino win percentage is normally distributed with mean5.26% and standard deviation 10%. Let x represent the average casinowin percentage after 100 bets on black/red in double-zero roulette....
Find p(5 < x < 15)
i have no idea how to do this question....don't know which equation i should use.....help ><
