15. If we were to graph the relationship of sample size [x axis] to sample accuracy [y axis], we would notice that:
a. There is a linear relationship between size and accuracy.
b. Accuracy increases quickly, up to about sample size 500, and then accuracy levels off with relatively small gains made even when sample size is increased to as much as 2,000.
c. Accuracy increases quickly, up to about sample size 5,000, and then
accuracy levels off with relatively small gains made even when sample size is increased to as much as 200,000.
d. Accuracy increases quickly, up to about sample size 50, and then accuracy levels off with relatively small gains made even when sample size is increased to as much as 100.
e. We cannot graph sample size and accuracy because we must also include the level of confidence and the variability within the sample data.
26. What three factors are needed to calculate sample size?
a. Variability, accuracy, and confidence level
b. Variability, accuracy, and population size
c. Accuracy, confidence level, and population size
d. Accuracy, population size, and costs
e. Variance, standard deviation, and dispersion
33. Which of the following statements best illustrates the concept of the "level of confidence" or z value chosen in sample size formulae?
A] By setting z at 1.96 it
means that the manager could expect, if she conducted the survey many, many times, the value of p would fall within the sample error range 95 percent of the time.
B] By setting z at 1.96 it means that the manager could expect, if she conducted the survey many, many times, the value of p would fall within the sample error range 5 percent of the time.
C] By setting z at 2.58 it means that the manager could expect, if she conducted the survey many, many times, the value of p would fall within
the sample error range 95 percent of the time.
D] By setting z at 1.96 it means that the manager could expect, if she conducted the survey many, many times, the value of p would fall within the sample error range 99 percent of the time.
E] By setting z at 2.58 it means that the manager could expect, if she conducted the survey many, many times, the value of p would fall within the sample error range 1 percent of the time.
91. A study is to be performed for a local restaurant, McGuire's, and Mr. McGuire wants to know the awareness of the restaurant name as well as satisfaction with food, service, and prices. Furthermore, being in the restaurant business for many years, Mr. McGuire is certain that he has very different clientele depending on which meal and whether they are there during the weekdays or weekends. Therefore, he wants to know answers to these issues by subgroups such as those who have eaten lunch meals, dinner meals, weekday patrons, and weekend patrons. Given these analysis goals, which sample size approach should be considered?
A] Arbitrary approach
B] Conventional approach
C] Statistical analysis approach
D] Confidence percentage approach
E] The cost basis approach
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Terms in this set [6]
degree of precision desired by the researcher
types of sampling procedure
the use of formulas [slovin's formula]
other considerations [acceptable sizes for the different types of research]
factors to consider in determining the sample size
slovin's formula
used to compute for sample size
used when you have limited information about the characteristics of the population
descriptive research
10% - 20% may be required
correlational research
30 subjects or respondents
comparative research
15 subjects / group
experimental design
15 - 30 subjects per group
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