When an opinion poll calls residential telephone numbers at

Reference no: EM13639527

1. A basketball player makes 60% of her free throws. She takes 7 free throws in a game. If the shots are independent of each other, the probability that she makes 5 out of the 7 shots is about

A. 0.012.

B. 0.261.

C. 0.523.

2. When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a live person. You watch the random dialing machine make 15 calls. X is the number that reach a live person.Does X have a binomial distribution?

A. Yes, the calls are independent, each one has two possibilities, and the probability of reaching a live person is the same for each call.

B. No, the calls are independent, each one has two possibilities, but the probability of reaching a live person is not the same for each call.

C. No, the calls are not independent.

D. No, the calls are independent, but each one has more than two possibilities.

Reference no: EM13639527

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