A representative sample: Question 1 options: a) b) c) d) Save Question 2 (10 poi

Question

A representative sample:

Question 1 options:

a)

b)

c)

d)

Save

Question 2 (10 points)

The discrepancy between sample values and population values is called:

Question 2 options:

a)

b)

c)

d)

Save

Question 3 (10 points)

Having a representative sample is important because it makes the:

Question 3 options:

a)

b)

c)

d)

Save

Question 4 (10 points)

One generates a sampling distribution by:

Question 4 options:

a)

b)

c)

d)

Save

Question 5 (10 points)

Given that = 10, N = 116, and M = 90, calculate the upper limit of the confidence interval.

Question 5 options:

a)

b)

c)

d)

Save

Question 6 (10 points)

Which statement does the central limit theorem not tell researchers who use a large Nsample?

Question 6 options:

a)

b)

c)

d)

Save

Question 7 (10 points)

In the 95 percent confidence interval, the brackets that extend ± 1.96 standard error of the mean capture the _____ for every sample mean.

Question 7 options:

a)

b)

c)

d)

Save

Question 8 (10 points)

The symbol represents the:

Question 8 options:

a)

b)

c)

d)

Save

Question 9 (10 points)

The central limit theorem works only when the:

Question 9 options:

a)

b)

c)

d)

Save

Question 10 (10 points)

The 95 percent confidence intervals that are built around means will:

Question 10 options:

a)

b)

c)

d)

a)

comes from a representative population.

b)

has all the attributes in the same proportion as in the population.

c)

is a subset of a random population.

d)

is the same as a random sample.

Explanation / Answer

Answer:

A representative sample:

Question 1 options:

a)

comes from a representative population.

Answer:

b)

has all the attributes in the same proportion as in the population.

c)

is a subset of a random population.

d)

is the same as a random sample.

Save

Question 2 (10 points)

The discrepancy between sample values and population values is called:

Question 2 options:

a)

informed consent.

b)

self-selection bias.

c)

consent rate.

Answer:

d)

sampling error.

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Question 3 (10 points)

Having a representative sample is important because it makes the:

Question 3 options:

a)

results from that study more valid.

b)

results from that study more reliable.

Answer:

c)

results from that study more generalizable.

d)

study easier to conduct.

Save

Question 4 (10 points)

One generates a sampling distribution by:

Question 4 options:

a)

making a frequency distribution of multiple samples of a specified size from a specified sample.

b)

using only representative and randomly selected samples to create a grouped frequency distribution.

Answer:

c)

making a frequency distribution of means or percentages performed on multiple samples of a specified size from a specified population.

d)

combining the data from convenience and representative samples of a population.

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Question 5 (10 points)

Given that = 10, N = 116, and M = 90, calculate the upper limit of the confidence interval.

Question 5 options:

a)

91.96

b)

88.04

Answer:

c)

91.82

d)

88.18

Save

95% upper limit = 90+1.96*10/sqrt(116) =91.82

Question 6 (10 points)

Which statement does the central limit theorem not tell researchers who use a large Nsample?

Question 6 options:

Answer:

a)

The standard deviation of the sample will be the same as that of the population from which the sample came.

b)

One can compute a standard error of the mean.

c)

The sampling distribution of the sample mean will be normally distributed.

d)

The mean of the sampling distribution will be the same as the mean of the population from which the sample came.

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Question 7 (10 points)

In the 95 percent confidence interval, the brackets that extend ± 1.96 standard error of the mean capture the _____ for every sample mean.

Question 7 options:

a)

standard deviation

b)

interval estimate

Answer:

c)

population mean

d)

point estimate

Save

Question 8 (10 points)

The symbol represents the:

Question 8 options:

Answer:

a)

population mean.

b)

standard deviation.

c)

standard error.

d)

sample mean.

Save

Question 9 (10 points)

The central limit theorem works only when the:

Question 9 options:

a)

population is over 50.

b)

sampling process is repeated at least 50 times.

Answer:

c)

sample is over 30.

d)

standard error is half of the standard deviation.

Save

Question 10 (10 points)

The 95 percent confidence intervals that are built around means will:

Question 10 options:

Answer:

a)

capture the population mean.

b)

capture the sample mean.

c)

fail to capture the sample mean.

d)

fail to capture the population mean.

a)

comes from a representative population.

Answer:

b)

has all the attributes in the same proportion as in the population.

c)

is a subset of a random population.

d)

is the same as a random sample.

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