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Which of these is named as a common type of variability in samples?
ACumulative variability from repeated rounding
BInduced variability from an artificial change
CQuartile variability from the ordering choice
DFrequency variability from the class widths
Answer & Solution
Correct answer: B. Induced variability from an artificial change
1. Four common types of variability are named: measurement, natural, induced and sample variability.
2. Induced variability arises when the researcher deliberately introduces a difference, such as limiting one group's sleep.
3. It is the counterpart to natural variability, which arises on its own between members of a population.
4. Rounding, quartiles and class widths are features of how data are recorded or displayed, not named types of variability.
_Source: OpenStax Introductory Business Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics", section 2.7 Measures of the Spread of the Data_
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