Question
In: Statistics and Probability
1. Assume that 7% of people are left-handed. If we select 5 people at random, find...
1. Assume that 7% 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. e. How many lefties do you expect? f. With what standard deviation?
2. According to government data, 35% of employed women have never been married. Rounding to 4 decimal places, if 15 employed women are randomly selected:
a. What is the probability that exactly 2 of them have never been married?
b. That at most 2 of them have never been married?
c. That at least 13 of them have been married?
Solutions
orchestra answered 2 years agoRelated Solutions
Assume that 73% of people are left-handed. If we select 5 people at random, find the...
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.
e. How many lefties do you expect?
f. With what standard deviation?
Assume that 37% of people are left-handed. If we select 5 people at random, find the...
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
than 2 lefties in the group. e. How many lefties do you expect? f.
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.
e. How many lefties do you expect?
f. With what standard deviation?
Assume that 57% of people are left-handed. If we select 5 people at random, find the...
Assume that 57% 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.
e. How many lefties do you expect?
f. With what standard deviation?
Assume that 41% of people are left-handed. If we select 5 people at random, find the...
Assume that 41% 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.
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.
e. How many lefties do you expect?
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.
c. There are at least 4 lefties in the group.
d. There are no more than 2 lefties in the group
. e. How many lefties do you expect?
f. With what standard...
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....
5. Suppose that researchers study a sample of 50 people and find that 10 are left-handed....
5. Suppose that researchers study a sample of 50 people and find
that 10 are left-handed. (a) Find a 95% confidence interval for the
population proportion that is left-handed.
(b) What would the confidence interval be if the researchers
used the Wilson value p ̃ instead?
(c) Suppose that an investigator tests the null hypothesis that
the population proportion is 18% against the alternative that it is
less than that. If α = 0.05 then find the critical value pˆc....
5. Suppose that researchers study a sample of 50 people and find that 10 are left-handed....
5. Suppose that researchers study a sample of 50 people and find
that 10 are left-handed. (a) Find a 95% confidence interval for the
population proportion that is left-handed. (b) What would the
confidence interval be if the researchers used the Wilson value ̃p
instead? (c) Suppose that an investigator tests the null hypothesis
that the population proportion is 18% against the alternative that
it is less than that. If α = 0.05 then find the critical value ˆpc.
Using...
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