Question

A normal population has mean

μ

=

52

and standard deviation

σ

=

7

. What is the

82

nd percentile of the population?

Answer #1

Graphically:

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 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 =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

If a population is distributed with a mean μ and a standard
deviation σ, then the distribution of sample means is
distributed
A) normally with mean μ and standard deviation σ.
B) normally with mean μ and standard deviation σ/√(n).
C) with mean μ and standard deviation σ.
D) with mean μ and standard deviation σ/√(n).

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 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?

Given that x is a normal variable with mean μ = 52 and standard
deviation σ = 6.4, find the following probabilities. (Round your
answers to four decimal places.) (a) P(x ≤ 60) Incorrect: Your
answer is incorrect. (b) P(x ≥ 50) Incorrect: Your answer is
incorrect. (c) P(50 ≤ x ≤ 60) Incorrect: Your answer is
incorrect.

A population has a mean μ=78 and a standard deviation σ=22. Find
the mean and standard deviation of a sampling distribution of
sample means with sample size
n=264.
μx= ?????

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