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In: Statistics and Probability

1. Assume that 13​% of people are​ left-handed. Suppose 8 people are selected at random. Answer...

1. Assume that 13​% of people are​ left-handed. Suppose 8 people are selected at random. Answer each question about​ right-handers below.

​a) Find the mean and standard deviation of the number of​ right-handers in the group.

​b) What's the probability that​ they're not all​ right-handed?

​c) What's the probability that there are no more than 5 ​righties?

d) What's the probability that the majority is​ right-handed?

2. A certain tennis player makes a successful first serve 64​% of the time. Assume that each serve is independent of the others. If she serves 9 times, what's the probability she gets​

a) all 9 serves​ in?

b) exactly 8 serves​ in?

c) at least 7 serves​ in?

d) no more than 4 serves​ in?

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orchestra answered 2 years ago
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