Question

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.

Answer #1

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= 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

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 = 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 = 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 population has a mean μ=40 and a standard deviation σ=4. What
is the standard deviation of the sampling distribution of the
sample means if the sample size is n=16?

1. 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 = 14.3; σ = 3.5
P(10 ≤ x ≤ 26)=?
2.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 = 5.9; σ = 1.1
P(7 ≤ x ≤ 9)=?
3. Assume that x has a normal...

A normal population has mean
μ
=
52
and standard deviation
σ
=
7
. What is the
82
nd percentile of the population?

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