4) For a population has a mean of μ = 16 and a standard
deviation of...
4) For a population has a mean of μ = 16 and a standard
deviation of σ= 8 find the z-score corresponding to a
sample mean of M= 20 for each of the following sample
sizes.
A population has mean μ = 16 and standard deviation σ = 1.5. A
random sample of size n = 49 is selected. What is the probability
that the sample mean is greater than 16.8?
I got 3.73 for z-value.
Please help
A population has a mean of μ = 70 and a standard
deviation of σ = 12
For the same population, find the score (X value) that
corresponds to each of the following z-scores.
z = 0.50: X=_____
z = 1.50: X=_____ z
= -2.50: X=_____
z = -0.25:
X=_____
z = -0.50: X=_____ z = 1.25:
X=_____
A sample has a mean of M = 30 and a standard deviation of s =
7. Find the z-score...
The mean of a population is 74 and the standard deviation is 16.
The shape of the population is unknown. Determine the probability
of each of the following occurring from this population.
a. A random sample of size 32 yielding a sample
mean of 78 or more
b. A random sample of size 130 yielding a sample
mean of between 71 and 76
c. A random sample of size 219 yielding a sample
mean of less than 74.7
(Round all...
The mean of a population is 74 and the standard deviation is 16.
The shape of the population is unknown. Determine the probability
of each of the following occurring from this population.
a. A random sample of size 32 yielding a sample mean of 76 or
more
b. A random sample of size 130 yielding a sample mean of between
72 and 76
c. A random sample of size 220 yielding a sample mean of less
than 74.3
A random sample is drawn from a population with mean μ = 70 and
standard deviation σ = 5.8. [You may find it useful to reference
the z table.]
a. Is the sampling distribution of the sample mean with n = 17
and n = 43 normally distributed?
Yes, both the sample means will have a normal distribution.
No, both the sample means will not have a normal
distribution.
No, only the sample mean with n = 17 will have...
A random sample is drawn from a population with mean μ
= 68 and standard deviation σ = 5.7. [You may find
it useful to reference the z table.]
a. Is the sampling distribution of the sample
mean with n = 16 and n = 41 normally
distributed?
Yes, both the sample means will have a normal distribution.
No, both the sample means will not have a normal
distribution.
No, only the sample mean with n = 16 will have...
A random sample is selected from a population with mean
μ = 98 and standard deviation σ = 10. Determine
the mean and standard deviation of the x sampling
distribution for each of the following sample sizes. (Round the
answers to three decimal places.)
(a) n = 8
μ =
σ =
(b) n = 18
μ =
σ =
(c) n = 38
μ =
σ =
(d) n = 55
μ =
σ =
(f) n = 110...
A random sample is drawn from a population with mean μ
= 72 and standard deviation σ = 6.0. [You may find
it useful to reference the z table.]
a. Is the sampling distribution of the sample
mean with n = 17 and n = 45 normally
distributed?
Yes, both the sample means will have a normal distribution.
No, both the sample means will not have a normal
distribution.
No, only the sample mean with n = 17 will have...
A random sample is selected from a population with mean
μ = 102 and standard deviation σ = 10. Determine
the mean and standard deviation of the x sampling
distribution for each of the following sample sizes. (Round the
answers to three decimal places.)
(a) n = 11
μ =
σ =
(b) n = 14
μ =
σ =
(c) n = 37
μ =
σ =
(d) n = 65
μ =
σ =
(f) n = 130...