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1A.

Among employed women, 25% have never been married. Select 13 employed women at random. (a) The number in your sample who have never been married has a binomial distribution. What are n and p? n = p = (b) What is the probability that exactly 3 of the 13 women in your sample have never been married? :I (c) What is the probability that 2 or fewer women have never been married? :I Suppose you purchase a bundle of 14 bare-root broccoli plants. The sales clerk tells you that on average you can expect 3% of the plants to die before producing any broccoli. Assume that the bundle is a random sample of plants. Use the binomial formula to nd the probability that you will lose at most 1 of the broccoli plants. S A university claims that 70% of its basketball players get degrees. An investigation examines the fate of all 15 players who entered the program over a period of several years. The number of athletes who graduate is 5(15, 0.70). Use the binomial probability formula to find the probability that all 15 graduate. S What is the probability that not all of the 15 graduate? E A factory employs several thousand workers, of whom 20% are Hispanic. If the 19 members of the union executive committee were chosen from the workers at random, the number of Hispanics on the committee would have the binomial distribution with n = 19 and p = 0.2. (a) What is the mean number of Hispanics on randomly chosen committees of 19 workers? |:| (b) What is the standard deviation 0 of the count X of Hispanic members? l:| (c) Suppose that 10% of the factory workers were Hispanic. Then p = 0.1. What is a in this case? |:| What is a ifp = 0.01? l:| What does your work show about the behavior of the standard deviation of a binomial distribution as the probability of a success gets closer to 0? 0 As ,0 decreases, 0 increases. 0 As ,0 increases, 0 increases. 0 As ,0 increases, 0 decreases. 0 As ,0 decreases, 0 decreases