(Answered) Question twins part iii at a large fertility clinic 152

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Question: Twins, part III. At a large fertility clinic, 152 women became pregnant while taking Clomid. (See Exercise.)

a) What are the mean and standard deviation of the number of twin births we might expect?

b) Can we use a Normal model in this situation? Explain.

c) What's the probability that no more than 10 of the women have twins?

Exercise: Twins. In the United States, the probability of having twins (usually about 1 in 90 births) rises to about 1 in 10 for women who have been taking the fertility drug Clomid. Among a group of 10 pregnant women, what's the probability that

a) at least one will have twins if none were taking a fertility drug?

b) at least one will have twins if all were taking Clomid?

c) at least one will have twins if half were taking Clomid?

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