Marketing Research Chapter 10
Showing posts with label Marketing Research Chapter 10. Show all posts
Showing posts with label Marketing Research Chapter 10. Show all posts

Which method of sample size determination uses cost as an overriding basis for sample size?

Which method of sample size determination uses cost as an overriding basis for sample size?


a. Cost basis of sample size specification
b. The conventional sample size specification
c. The statistical analysis requirements sample size specification
d. The arbitrary "rule of thumb" sample size
e. None of the other answers uses cost.


Answer: a. Cost basis of sample size specification

Which of the following is NOT one of the Axioms of Random Sample Size and Sample Accuracy?

Which of the following is NOT one of the Axioms of Random Sample Size and Sample Accuracy?


a. The smaller a random sample is, the more accurate it is, meaning the less margin of sample error it has.
b. A random sample will always have some inaccuracy, which is referred to as margin of sample error or simply sample error.
c. Margin of sample error can be calculated with a simple formula and expressed as a ±% number.
d. The only perfectly accurate sample is a census.
e. In almost all cases, the margin of sample error of a random sample is independent of the size of the population.


Answer: a. The smaller a random sample is, the more accurate it is, meaning the less margin of sample error it has.

____ holds that if we repeated a "yes or no" survey question a great many times-perhaps 1000-each with a new random sample of the same size, and we made a bar chart of all 1000 percents of "yes" results, the bar chart would look like a normal curve.

____ holds that if we repeated a "yes or no" survey question a great many times-perhaps 1000-each with a new random sample of the same size, and we made a bar chart of all 1000 percents of "yes" results, the bar chart would look like a normal curve.


a. The central limit theorem
b. The standard deviation
c. The normal distribution
d. The confidence interval
e. The experience curve


Answer: a. The central limit theorem

_____ refers to how close a random sample's statistic (for example, mean of the responses to a particularquestion) is to the population's value (that is, the true mean of the population) it represents.

_____ refers to how close a random sample's statistic (for example, mean of the responses to a particularquestion) is to the population's value (that is, the true mean of the population) it represents.


a. Sample probability
b. Sample representativeness
c. Sample size
d. Sample accuracy
e. Sample bias


Answer: d. Sample accuracy

Which of the following statements is true about the sample size and sample representativeness?

Which of the following statements is true about the sample size and sample representativeness?


a. Sample size pertains to the extent the sample is a true subset of the population, while sample representativeness refers to the number of respondents in a survey.
b. Sample size and sample representativeness are related to each other.
c. Sample size and sample representativeness mean the same thing.
d. Sample size is determined by the selection method and sample representativeness is determined by sample accuracy.
e. Sample size and sample representativeness are not related to each other.


Answer: e. Sample size and sample representativeness are not related to each other.

You are determining the sample size needed to estimate a percentage. Which method below would you NOT use to estimate the variance in the population?

You are determining the sample size needed to estimate a percentage. Which method below would you NOT use to estimate the variance in the population?


a. Conduct a pilot study of 100 people.
b. A study on the same population that was conducted last year.
c. A study on the same population that was conducted two years ago.
d. Take the maximum variance of 50/50.
e. Estimate the range and divide by 6.


Answer: e. Estimate the range and divide by 6.

The level of confidence is typically set at:

The level of confidence is typically set at:


a. Very low levels to keep costs reasonable
b. 50% to 80%
c. 75% to 100%
d. About 50%
e. 95% or 99%


Answer: e. 95% or 99%

The e in the standard sample size formula stands for:

The e in the standard sample size formula stands for:


a. Standard error associated with the chosen level of confidence
b. Expected error
c. Estimated percent in the population
d. Statistical error
e. Acceptable margin of sample error


Answer: e. Acceptable margin of sample error

Which of the following describes what happens when sample size is increased?

Which of the following describes what happens when sample size is increased?


a. The mean shifts to the right.
b. Sample error goes up.
c. There is more error in data interpretation.
d. Sample error goes down.
e. Data analysis errors increase.


Answer: d. Sample error goes down.

We can determine the amount of sample error in a survey question for the 95% level of confidence if we know:

We can determine the amount of sample error in a survey question for the 95% level of confidence if we know:


a. Consistency indicator, 2.58, and p but not q
b. Confidence interval, level of accuracy and 2.58
c. Variability, sample size, and 1.96
d. Acceptable error, allowable error, and desired error
e. Accuracy level, e, 1.98 and the square root of n


Answer: c. Variability, sample size, and 1.96

The opening vignette in Chapter 10 from an executive with Survey Sampling International illustrates what basic idea about sample size when conducting a telephone survey?

The opening vignette in Chapter 10 from an executive with Survey Sampling International illustrates what basic idea about sample size when conducting a telephone survey?


a. A desire to save money by not drawing too large a sample for telephone surveys.
b. Telephone surveys can be accomplished with very small samples.
c. If you have determined your sample size needs to be a certain size, say 800, you will need to have a sample size several times larger, say about 9,000, of numbers to call in a telephone interview.
d. A correct belief that sample size determines a sample's representativeness in telephone surveys.
e. It is easier to sample for telephone surveys because SSI now has access to non-listed numbers.


Answer: c. If you have determined your sample size needs to be a certain size, say 800, you will need to have a sample size several times larger, say about 9,000, of numbers to call in a telephone interview.
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