The student nurse is examining the dispersion of data in a research study. Measurements would include which of the following?
1. Mean, median, and mode
2. Range, variance, and standard deviation
3. Mean, range, and standard deviation
4. Measures of central tendency
Correct Answer: 2
Rationale: Measures of variability indicate the degree of dispersion or spread of the data. They include the range, variance, and standard deviation. Measures of central tendency describe the center of distribution of the data, denoting where most of the subjects lie. They include the mean, median, and mode.
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