Deck 11: Sampling Procedures

Question 1

If a population is defined as all pickup truck owners residing in Tippecanoe County.

A)asking 100 owners their attitude toward a new truck style would be an example of example of a consensus.
B)asking 80 owners their attitude toward a new gun rack design would be an example of a sample.
C)asking all owners their attitude toward a new truck style would be an example of universal testing.
D)asking only owners listed in the telephone directory would be an example of a sampling frame.
E)None of the above are true.

Answer 1

asking 80 owners their attitude toward a new gun rack design would be an example of a sample.

Question 2

All of the following are reasons why a researcher might choose a sample over a census for making inferences about population, except

A) a census may not be plausible.
B) samples are less expensive.
C) a census has less nonsampling error.
D) a census is less accurate.
E) All of the above are reasons to choose a sample over a census.

Answer 2

a census has less nonsampling error.

Question 3

The first step that must be executed in drawing a sample is to

A) determine the sample size.
B) define the population.
C) select a sampling procedure.
D) select the sample elements.
E) identify the sampling frame.

Answer 3

define the population.

Question 4

The following list contains the six-step procedure for drawing a sample. Select the proper order for this procedure.
A-Collect the data from the designated elements.
B- Identify the sampling frame.
C-Define the population.
D- Determine the sample size.
E- Select a sampling procedure.
F- Select the sample elements.

A)C,B,D,E,F,A
B)B,C,D,E,F,A.
C)F,D,B,E,C,A
D)C,B,E,D,F,A
E)D,C,B,E,F,A

Question 5

Sampling plans fall under the following basic categories:

A) probability
B) area
C) nonprobability
D) a and b
E) a and c

Question 6

Quota samples are typically selected so that the distribution of a characteristic or characteristics in the sample matches the distribution of these same characteristic(s) in the population. With respect to the representativeness of quota samples, it can thus be said that

A) a quota sample may be very far off the mark with respect to other important characteristics likely to influence the result but that were not used as controls when selecting the sample.
B) the fact that the distribution of the characteristic in the sample parallels the distribution in the population does not guarantee that the sample is representative.
C) the quota assigned each field worker should exactly mirror the distribution of the control characteristic(s) in the population.
D) a and b are true.
E) a, b, and c are true.

Question 7

The weaknesses of a quota sample include

A) the sample could be skewed with respect to a noncontrol characteristic that is likely to affect the observed variable.
B) interviewers are allowed to choose their subjects and interview locations.
C) it is difficult to verify whether the sample chosen is representative of the population.
D) b and c.
E) a, b, and c.

Question 8

Which of the following statements is true?

A) A sampling distribution is the probability distribution of elements from a particular sample.
B) The standard error of the mean is the standard deviation of the sampling distribution of sample means.
C) The sampling distribution of the mean is another name for the frequency distribution that results from a single sample.
D) The sampling distribution of the mean is another name for the distribution of means corresponding to the samples that could be drawn under the specified sampling plan.
E) Both b and d are true.

Question 9

A researcher is considering drawing a sample of size n from a negatively skewed parent population with a mean, $\underline{u}$ , and variance $\sigma$ ²; he should realize that n is ___, the sample mean x is ___ distributed with mean x and variance $\sigma$ ²/n (assuming the sample represents a small proportion of the population).

A) small; normally
B) large; normally
C) small; binominally
D) large; binominally
E) none of the above

Question 10

The variance of the sample means is related to the population variance by which of the following expressions when sampling without replacement from a finite population?

A)
B)
C)
D)
E) None of the above are true.

Question 11

Which of the following is the best criterion to use to partition owners of sports cars?

A) income
B) age
C) gender
D) occupation
E) education

Question 12

The steps necessary to perform a cluster sample of Dove Bar Milk Chocolate consumers are

A) perform a census of two systematically chosen strata.
B) divide the consumers into separate groups on the basis of age categories (e.g., <18, 19-24, 25-34, 35-44, 45-64, 65+).
C) perform simple random sampling in all the strata.
D) randomly choose two age categories and interview all or some of those consumers.
E) b and d.

Question 13

In cluster sampling, statistical efficiency

A) is often traded off for increased economic efficiency.
B) is apparent if one samples 50 population elements instead of 20.
C) is the same as the overall efficiency of a sampling plan.
D) can be offset by observational efficiency.
E) b and d.

Question 14

In the previous example, the researcher selects his sample by choosing 50 blocks and 8 households per block. The second stage sampling fraction is ____.

A) 8/10
B) 1/8
C) 1/10
D) 1/2
E) indeterminate

Question 15

Which of the following is not true about sampling (circle one):

A) there may exist sampling biases in internet research
B) larger samples are always better for surveys
C) small samples suffice for focus groups
D) convenience samples can, on occasion, be used to generalize to the target population
E) larger samples are necessary for greater confidence levels (as z goes from 1.96 to 2.58)