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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Assume that 15% of people are left-handed. If 6people are
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a) Find the probability that the first lefty is the sixth
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(Round to four decimal places as needed.)
b) Find the probability that there are some lefties among the 6
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c) Find the probability that the first lefty is the fourth or
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Approximately 13% of the population are left-handed. If three people are randomly selected, what is the...
Approximately 13% of the population are left-handed.
If three people are randomly selected, what is the probability
that all are left- handed? (round to 4
decimal places)
If three people are randomly selected, what is the probability
that at least 1 person is not left handed?
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Notice that these two events are complementary (the
probabilities do add up to 1).
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Assume that 73% of people are left-handed. If we select 5 people
at random, find the probability of each outcome described below,
rounded to four decimal places:
a. There are some lefties (≥ 1) among the 5 people.
b. There are exactly 3 lefties in the group.
c. There are at least 4 lefties in the group.
d. There are no more than 2 lefties in the group.
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Assume that 37% of people are left-handed. If we select 5 people
at random, find the probability of each outcome described below,
rounded to four decimal places: a. There are some lefties ( ≥ 1)
among the 5 people. b. There are exactly 3 lefties in the group. c.
There are at least 4 lefties in the group. d. There are no more
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With what standard...
Assume that 51% of people are left-handed. If we select 5 people at random, find the...
Assume that 51% of people are left-handed. If we select 5 people
at random, find the probability of each outcome described below,
rounded to four decimal places:
a. There are some lefties (≥ 1) among the 5 people.
b. There are exactly 3 lefties in the group.
c. There are at least 4 lefties in the group.
d. There are no more than 2 lefties in the group.
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Assume that 57% 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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f. With what standard deviation?
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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 deviation?
Assume that 74% of people are left-handed. If we select 5 people at random, find the...
Assume that 74% of people are left-handed. If we select 5 people
at random, find the probability of each outcome described below,
rounded to four decimal places:
a. There are some lefties (≥ 1) among the 5 people.
b. There are exactly 3 lefties in the group.
c. There are at least 4 lefties in the group.
d. There are no more than 2 lefties in the group.
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f. With what standard deviation?
Assume that 80% of people are left-handed. If we select 5 people at random, find the...
Assume that 80% of people are left-handed. If we select 5 people
at random, find the probability of each outcome described below,
rounded to four decimal places:
a. There are some lefties (≥ 1) among the 5 people.
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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