Question

A population has parameters μ=126.3μ=126.3 and σ=57.9σ=57.9. You
intend to draw a random sample of size n=221n=221.

What is the mean of the distribution of sample means?

μ¯x=μx¯=

What is the standard deviation of the distribution of sample
means?

(Report answer accurate to 2 decimal places.)

σ¯x=σx¯=

Answer #1

Solution :

Given that ,

mean = = 126.3

standard deviation = = 57.9

n = 221

sample distribution of sample mean is ,

=

= 126.3

sampling distribution of standard deviation

= / n = 57.9 / 221

= 3.89

A population has parameters μ=126.3μ=126.3 and σ=57.9σ=57.9. You
intend to draw a random sample of size n=221n=221.
What is the mean of the distribution of sample means?
μ¯x=μx¯=
What is the standard deviation of the distribution of sample
means?
(Report answer accurate to 2 decimal places.)
σ¯x=σx¯=

A population of values has a normal distribution with μ=169μ=169
and σ=84.7σ=84.7. You intend to draw a random sample of size
n=157n=157.
What is the mean of the distribution of sample means?
μ¯x=μx¯=
What is the standard deviation of the distribution of sample
means?
(Report answer accurate to 2 decimal places.)
σ¯x=σx¯=

A population of values has a normal distribution with
μ=190.1μ=190.1 and σ=91.6σ=91.6. You intend to draw a random sample
of size n=151n=151.
a) What is the mean of the distribution of sample means?
μ¯x=μx¯=
b) What is the standard deviation of the distribution of sample
means?
(Report answer accurate to 2 decimal places.)
σ¯x=σx¯=

A population of values has a normal distribution with μ=159.6
and σ=75.4 You intend to draw a random sample of size n=125
What is the mean of the distribution of sample means?
μ¯x=
What is the standard deviation of the distribution of sample means
(i.e. the standard error)?
(Report answer accurate to 2 decimal places.)
σ¯x=

1.) A population of values has a normal distribution with
μ=33.7μ=33.7 and σ=19.7σ=19.7. You intend to draw a random sample
of size n=113n=113.
a.))) What is the mean of the distribution of sample means?
b.))) What is the standard deviation of the distribution of
sample means?
2.) A population has parameters μ=143.4μ=143.4 and σ=49.4σ=49.4.
You intend to draw a random sample of size n=156n=156.
a.))) What is the mean of the distribution of sample means?
b.))) What is the standard...

A population of values has a normal distribution with
μ=144.2μ=144.2
and
σ=96.9σ=96.9.
You intend to draw a random sample of size
n=47n=47.
Find
P35,
which is the mean separating the bottom 35% means from the top 65%
means.
P35
(for sample means) =
Enter your answers as numbers accurate to 1 decimal place. Answers
obtained using exact
z-scores
or
z-scores
rounded to 3 decimal places are accepted.

1.A population of values has a normal distribution with
μ=213.2 and σ=86.8. You intend to draw a random sample of size
n=15.
Find P73, which is the score separating the
bottom 73% scores from the top 27% scores.
P73 (for single values) =
Find P73, which is the mean separating the
bottom 73% means from the top 27% means.
P73 (for sample means) =
Enter your answers as numbers accurate to 1 decimal place.
2.A leading magazine (like Barron's) reported...

A population of values has a normal distribution with
μ=199.9μ=199.9 and σ=45.2σ=45.2. You intend to draw a random sample
of size n=111n=111.
Find the probability that a single randomly selected value is
greater than 200.3.
P(X > 200.3) =
Find the probability that a sample of size n=111n=111 is
randomly selected with a mean greater than 200.3.
P(¯xx¯ > 200.3) = Enter your answers as
numbers accurate to 4 decimal places.

Suppose x has a normal distribution with mean μ = 16 and
standard deviation σ = 11. Describe the distribution of x values
for sample size n = 4. (Round σx to two decimal places.)
μx = σx = Describe the distribution of x values for sample size
n = 16. (Round σx to two decimal places.)
μx = σx = Describe the distribution of x values for sample size
n = 100. (Round σx to two decimal places.)
μx...

Suppose x has a normal distribution with mean μ = 26 and
standard deviation σ = 6. Describe the distribution of x values for
sample size n = 4. (Round σx to two decimal places.) μx = σx =
Describe the distribution of x values for sample size n = 16.
(Round σx to two decimal places.) μx = σx = Describe the
distribution of x values for sample size n = 100. (Round σx to two
decimal places.) μx...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 2 minutes ago

asked 3 minutes ago

asked 3 minutes ago

asked 4 minutes ago

asked 8 minutes ago

asked 8 minutes ago

asked 8 minutes ago

asked 8 minutes ago

asked 13 minutes ago

asked 16 minutes ago

asked 18 minutes ago

asked 19 minutes ago