Question

x | P(x) |

0 | 0.25 |

1 | 0.05 |

2 | 0.15 |

3 | 0.55 |

Find the standard deviation of this probability distribution. Give
your answer to at least 2 decimal places

Answer #1

thank you.

1.
x
P(x)
0
0.1
1
0.15
2
0.25
3
0.5
Find the standard deviation of this probability distribution. Give
your answer to at least 2 decimal places
2. The student council is hosting a drawing to raise money for
scholarships. They are selling tickets for $7 each and will sell
700 tickets. There is one $2,000 grand prize, two $200 second
prizes, and ten $30 third prizes. You just bought a ticket. Find
the expected value for your profit....

You are given the probability distribution below:
x
0
1
2
3
4
p(x)
0.05
0.35
0.25
0.20
0.15
Determine the standard deviation of X. Report your
answer to three decimal places.

Given the following table, answer the questions below.
x
f(x)
0
0.05
1
0.2
2
0.3
3
0.45
a) Find the mean of this probability distribution. Round your
answer to one decimal place.
b) Find the standard deviation of this probability distribution.
Give your answer to at least 2 decimal places.

Consider a random variable X with the following probability
distribution:
P(X=0) = 0.08, P(X=1) = 0.22,
P(X=2) = 0.25, P(X=3) = 0.25,
P(X=4) = 0.15, P(X=5) =
0.05
Find the expected value of X and the standard deviation of
X.

Find the standard deviation of this probability distribution. Give
your answer to at least 2 decimal place
x
P(x)
0
0.3
1
0.05
2
0.3
3
0.35
2.) A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 10.2 years, and standard
deviation of 2.5 years.
If you randomly purchase one item, what is the probability it will
last longer than 9 years?
Round answer to three decimal places

Consider the probability distribution shown below.
x
0
1
2
P(x)
0.65
0.30
0.05
Compute the expected value of the distribution.
Compute the standard deviation of the distribution. (Round your
answer to four decimal places.)

Consider the probability distribution shown below.
x 0 1 2
P(x) 0.05 0.20 0.75
Compute the expected value of the distribution.
Compute the standard deviation of the distribution. (Round your
answer to four decimal places.)

x
p(x)
x.p(x)
x-σ
(x-σ)2
(x-σ)2 .p(x)
1
0.25
2
0.50
3
0.25
for the following probability distribution find the mean and the
standard deviation. (complete the chart above).

Consider the probability distribution shown below.
x
0
1
2
P(x)
0.05
0.50
0.45
Compute the expected value of the distribution.
Consider a binomial experiment with
n = 7 trials
where the probability of success on a single trial is
p = 0.10.
(Round your answers to three decimal places.)
(a) Find
P(r = 0).
(b) Find
P(r ≥ 1)
by using the complement rule.
Compute the standard deviation of the distribution. (Round your
answer to four decimal places.)
A...

Find the mean and standard deviation of the distribution shown.
x 4 2 1 0 P(x) 0.27 0.14 0.54 0.05

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