Question

A normal population has mean μ= 34 and standard deviation σ= 10.

(a) What proportion of the population is between 10 and 20?

(b) What is the probability that a randomly chosen value will be between 28 and 38?

Round the answers to at least four decimal places

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A normal population has mean μ =40 and standard deviation σ
=9.
(a) What proportion of the population is between 20 and 30?
(b) What is the probability that a randomly chosen value will be
between 35 and 45?
Round the answers to at least four decimal places.

A normal population has mean μ=40 and standard deviation σ
=9.
(a) What proportion of the population is between 20 and 30 ?
(b) What is the probability that a randomly chosen value will be
between 35 and 45?
Round the answers to at least four decimal places

A normal population has mean μ = 31 and standard deviation σ =
6. (a) What proportion of the population is between 19 and 28? (b)
What is the probability that a randomly chosen value will be
between 26 and 36? Round the answers to at least four decimal
places. Part 1 of 2 The proportion of the population between 19 and
28 is . Part 2 of 2 the probability that a randomly chosen value
will be between 26...

A normal population has mean μ 30 = 31 and standard deviation σ=
7
(a) What proportion of the population is between 15 and 25?
(b) What is the probability that a randomly chosen value will be
between 25 and 35?
Round the answers to at least four decimal places.

A normal population has mean μ = 9 and standard
deviation σ = 6.
a.
What proportion of the population is less than 20?
b.
What is the probability that a randomly chosen value will be
greater than 5?

A normal population has mean =μ9 and standard deviation =σ5.
(a) What proportion of the population is less than 20?
(b) What is the probability that a randomly chosen value will be
greater than 5?
Round the answers to four decimal places.

normal population has mean =μ10 and standard deviation =σ7. (a)
What proportion of the population is less than 18? (b) What is the
probability that a randomly chosen value will be greater than 3?
Round the answers to four decimal places. Part 1 of 2 The
proportion of the population less than 18 is . Part 2 of 2 The
probability that a randomly chosen value will be greater than 3 is
.

a.) Assume that x has a normal distribution with the
specified mean and standard deviation. Find the indicated
probability. (Round your answer to four decimal places.)
μ = 4.4; σ = 2.2
P(3 ≤ x ≤ 6) =
b.) Consider a normal distribution with mean 34 and standard
deviation 2. What is the probability a value selected at random
from this distribution is greater than 34? (Round your answer to
two decimal places.)
c.) Assume that x has a normal...

1)Given that x is a normal variable with mean
μ = 46 and standard deviation σ = 6.2, find the
following probabilities. (Round your answers to four decimal
places.)
(a) P(x ≤ 60)
(b) P(x ≥ 50)
(c) P(50 ≤ x ≤ 60)
2)The Customer Service Center in a large New York department
store has determined that the amount of time spent with a customer
about a complaint is normally distributed, with a mean of 9.9
minutes and a standard deviation of 2.4...

For a Normal distribution with mean, μ=2, and standard
deviation, σ=4,
10% of observations have a value less than Round to 4 decimal
places.
10% of observations have a value greater than Round to 4 decimal
places.

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