Question

Which of the following statements about the sampling distribution of the sample mean, ¯xx¯ , is the correct?

1The distribution is normal regardless of the shape of the population distribution, as long as the sample size, n, is large enough.

2The distribution is normal regardless of the sample size, as long as the population distribution is normal.

3The distribution's mean is the same as the population mean.

4The distribution's standard deviation is smaller than the population standard deviation.

5All of the above statements are correct.

Answer #1

Question 2: Which of the following statements about the
sampling distribution of means is not true?
A. A sample distribution's mean will always equal the parent
population distribution's mean
B. The sampling distribution of means approximates the normal
curve.
C. The mean of a sampling distribution of means is equal to the
population mean.
D. The standard deviation of a sampling distribution of means is
smaller than the standard deviation of the population.

Which of the following is true regarding the sampling
distribution of the mean for a large sample size?
Select one:
a. It has the same shape, mean, and standard deviation as the
population.
b. It has the same shape and mean as the population, but has a
smaller standard deviation.
c. It has a normal distribution with the same mean as the
population but with a smaller standard deviation.
d. It has a normal distribution with the same mean and...

Which of the following is NOT true regarding the sampling
distribution of the mean (Sample mean X-bar) for a large sample
size (sample size is greater than 36)? A. It has the same mean as
the population. B. It has a smaller standard deviation than the
population standard deviation. C. Approximately it follows a normal
distribution. D. It has the same distribution as the
population.

Which of the following statements are true?
I. The sampling distribution of ¯xx¯ has standard deviation σ√nσn
even if the population is not normally distributed.
II. The sampling distribution of ¯xx¯ is normal if the population
has a normal distribution.
III. When nn is large, the sampling distribution of ¯xx¯ is
approximately normal even if the the population is not normally
distributed.
I and II
I and III
II and III
I, II, and III
None of the above gives...

Which of the following statements are true?
I. The sampling distribution of ¯xx¯ has standard deviation σ√nσn
even if the population is not normally distributed.
II. The sampling distribution of ¯xx¯ is normal if the population
has a normal distribution.
III. When nn is large, the sampling distribution of ¯xx¯ is
approximately normal even if the the population is not normally
distributed.
I and II
I and III
II and III
I, II, and III
None of the above gives...

Which of the following is true?
The shape of the sampling distribution of sample proportion is
always bell-shaped.
As n increases, the mean of the sampling distribution of sample
proportion gets closer to the population proportion.
The shape of the sampling distribution of sample proportion
becomes approximately normal as n gets large.
The shape of the sampling distribution of sample proportion gets
closer to the shape of the population distribution as n gets
large.

Which of the following statements is not true for sampling
distributions?
a. A sampling distribution is necessary for making confidence
statements about an unknown population parameter.
b. A sampling distribution depends on the nature of the
population being sampled.
c. When sampling at random from a normal population, the
sampling distribution for the sample average is a normal
distribution.
d. None of the above.
AND
TRUE or FALSE
Assume a random sample of size n is from a normal population....

A manufacturing process produces bags of cookies. The
distribution of content weights of these bags is Normal with mean
15.0 oz and standard deviation 1.0 oz. We will randomly select
n bags of cookies and weigh the contents of each bag
selected.
Which of the following statements is true with respect to the
sampling distribution of the sample mean, ¯xx¯?
According to the law of large numbers, if the sample size,
n, increases, ¯xx¯ will tend to be closer to...

Which one of the following statements is
true?
A. The Central Limit Theorem states that the sampling
distribution of the sample mean, y , is approximately
Normal for large n only if the distribution of the population is
normal.
B. The Central Limit Theorem states that the sampling
distribution of the sample mean, y , is approximately
Normal for small n only if the distribution of the population is
normal.
C. The Central Limit Theorem states that the sampling
distribution...

Which of the following statements are TRUE?
Note that there may be more than one correct answer; select all
that are true.
1. a) All else being equal, the standard deviation of the
sampling distribution of the sample mean will be smaller for n = 10
than for n = 40.
b) The value of a statistic does not vary from sample to
sample.
c) Statistics have sampling distributions.
d) The value of a parameter does not vary from sample...

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