Question

2. A consumer survey randomly selects 2000 people and asks them about their income and their television-watching habits. The results are shown in the following table. The numbers within the table reflect people in various categories of TV-watching and annual income. As a reward for participation, each person is given a small prize. Then the names are placed in a box and one name is randomly selected to receive the grand prize of a free vacation trip to Edgewood Hours of TV Watched per Week Annual Income 0-8 9-15 16-22 23-30 More than 30 TOTAL 168 385 654 541 252no Less than $ 12,000 8 28 120 232 $ 12,000-$ 24,999 $ 25,000-$ 39,999 $40,000 _ $ 59,999 $60,000 or more7360 10 18 -31- 19 32 327 165 _-55 100 12 52 TOTAL 143 211 336 657 653 2000 gRiwollot s What is the probability that the winner of the grand prize: a. Earns at least $ 25,000? b. Watches TV at least 16 hours each week? c. Earns at least $ 40,000 and watches TV at least 23 hours a week? d. Earns less than $ 40,000 or watches TV at most 22 hours each week ? e. Watches TV at most 22 hours each week given that he/she earns less than $ 60,000? f. Watches TV no more than 30 hours each week? g. Watches TV for at most 15 hours each week or earns at least $ 25,000 h. Doesn't earn at least $ 25,000 per year? i. Neither watches TV for over 8 hours nor earns above $ 25,000? j. Earns at least $ 12,000 given that he/she watched TV at least 16 hours week? per

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Answer 1

Som Pata 1447 The probabi% ฝั่ H. winner of thegrand each week is = 336+657+(53

fente Lenat $40000 and uatdu TVひ 23 h a weak o 165+00+55+12 332 e earrM al".kaut ģ4奻to and ω0fchon.TV (Answen) 5+16+19-29+ 18-322 2000

eauh weak 162+38 5+65%+ 54( Frem ths givetble, P(B) 2000 2000 505 2000 2525 planB) 0.2525 : O. 2839

D029 9 The n.peoph watchio Tv no more on 50んtro each week = 1347

(A UB )- 143+211. -359.2 0.1孖 n) 2000 2๙ 2000 っ2000っ0.723.5 p(Ang) = ,3-3 2+ 31+35+43460 299 .) 0 751

Pact 2000-(654+51 l+ 252 ב2000-1417 553 eams above 2/ earno above

395+ 654 511+252,1932- 0.91 2000 200O PÍAAB)-3362450453, 20%。0.823 28+ 96+232+ 89+ 327+1900+52+ 55+12 200 2000 PB) 823 t leant