24)Sponsors of a local charity decided to attract wealthy patrons to its $500-a-plate dinner by allowing each patron to buy a set of 20 tickets for the gaming tables. The chance of winning a prize for each of the 20 plays is 50-50. If you bought 20 tickets, what is the chance of winning 15 or more prizes?

A.0.250

B.0.021

C.0.006

D.0.750

25.What kind of distributions are the binomial and Poisson probability distributions?

A.Discrete

B.Continuous

C.Both discrete and continuous

D.Neither discrete or continuous

26.Which of the following is correct about a probability distribution?

A.The sum of all possible outcomes must equal 1.0.

B.Outcomes must be mutually exclusive.

C.The probability of each outcome must be between 0.0 and 1.0 inclusive.

D.All apply.

27.Data show that the weight of an offensive linesman may be any weight between 200 and 350 pounds. The distribution of weight is based on a ______________.

A.Continuous random variable

B.Discrete random variable

C.Qualitative variable

D.All apply

28.Carlson Jewelers permits the return of their diamond wedding rings, provided the return occurs within two weeks of the purchase date. Their records reveal that 10% of the diamond wedding rings are returned. Five different customers buy a wedding ring. What is the probability that none of the customers return a ring?

A.0.250

B.0.073

C.0.590

D.0.500

29.In a large metropolitan area, past records revealed that 30% of all the high school graduates go to college. From 20 graduates selected at random, what is the probability that exactly 8 will go to college?

A.0.114

B.0.887

C.0.400

D.0.231

30.Chances are 50-50 that a newborn baby will be a girl. For families with five children, what is the probability that all the children are girls?

A.0.900

B.0.031

C.0.001

D.0.250

31.A new car was put into production. It involved many assembly tasks. Each car was inspected at the end of the assembly line and the number of defects per unit was recorded. For the first 100 cars produced, there were 40 defective cars. Some of the cars had no defects, a few had one defect, and so on. The distribution of defects followed a Poisson distribution. Based on the first 100 cars produced, about how many out of every 1,000 cars assembled should have one or more defects?

A.About 660

B.About 165

C.About 630

D.About 330

32.The production department has installed a new spray machine to paint automobile doors. As is common with most spray guns, unsightly blemishes often appear because of improper mixture or other problems. A worker counted the number of blemishes on each door. Most doors had no blemishes; a few had one; a very few had two; and so on. The average number was 0.5 per door. The distribution of blemishes followed the Poisson distribution. Out of 10,000 doors painted, about how many would have no blemishes?

A.About 6,065

B.About 3,935

C.About 5,000

D.About 500

33.A manufacturer of headache medicine claims it is 70% effective within a few minutes. That is, out of every 100 users, 70 get relief within a few minutes. A group of 12 patients are given the medicine. If the claim is true, what is the probability that eight have relief within a few minutes?

A.0.001

B.0.168

C.0.667

D.0.231

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