Question
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?
Solutions
thank you
orchestra answered 3 years agoRelated Solutions
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(Round to four decimal places as needed.)
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Approximately 13% of the population are left-handed. If three people are randomly selected, what is the...
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If three people are randomly selected, what is the probability
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decimal places)
If three people are randomly selected, what is the probability
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Notice that these two events are complementary (the
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among the 5 people. b. There are exactly 3 lefties in the group. c.
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Assume that 74% of people are left-handed. If we select 5 people
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b. There are exactly 3 lefties in the group.
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d. There are no more than 2 lefties in the group
. e. How many lefties do you expect?
f. With what standard...
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