quiz 1_2007Fall

quiz 1_2007Fall - QUIZ #1 SOLUTION (1) (a) (b) (2) (a) (b)...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: QUIZ #1 SOLUTION (1) (a) (b) (2) (a) (b) (3) (a) No. Stratified. .93 1 - .13 The number of plates with 0,1 and 2 scratches. The number 130, 200 and 170. (b) 0130+1200+2170 = 1.08 500 2 2 2 (c) (-1.08) 130+.08 200+.92 170 500 (4) (a) P (F T ) = P (F ) + P (T ) - P (F T ) = .4 + .3 - .12 = .58 (b) P (Chevy) = .25 (GC) .25 (c) P (C|G) = P P (G) = .35 (d) Not independent because P (car) = .7,P (G) = .35 P (G Car) = .245 = P (G Car) = .25 (5) Note that P (A) = .7, P (B|A) = .6 and P (B|Ac ) = .1. (a) P (B) = P (B A) + P (B Ac ) = P (B|A)P (A) + P (B|Ac )P (Ac ) = .6 .7 + .1 .3 = .45 c B) c )P c (b) P (Ac |B) = P (A(B) = P (B|A(B) (A ) = .1.3 P P .45 1 ...
View Full Document

Ask a homework question - tutors are online