here are my problems,almost heated discussions
1.For distribution,I wrote (111,112,211,121,etc..)then I got weird answers like w/8000 x/8000 y/8000 z/8000..anyone? ALMOST everyone in my class did this way.I actually dunno what did 'range' mean in that question.Anyone?
2.For 8,I used X~B(10,0.6).For(b),I used p who don't ask for water (0.4) to calculate,then I got 0.9536 maybe.Anyone?
3.For a question about blah blah half minute,I did F(2.5)-F(1.5) but my mate used 0-1.5 and 4-2.5 .I think he is probably right.