METHODS OF DATA ANALYSIS
MEASURES OF DISPERSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is most appropriate to calculate the mean when using which level of measurement?
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Nominal data
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Ordinal data
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Interval data
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None of the above
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Explanation:
Detailed explanation-1: -The median is used with ordinal-level data or when an interval/ratio-level variable is skewed (think of the Bill Gates example). The mean can only be used with interval/ratio level data.
Detailed explanation-2: -Calculation: In interval data, one can add or subtract values but cannot divide or multiply. Almost all statistical analysis are applicable when calculating interval data, mean, mode, median etc.
Detailed explanation-3: -In interval scales, the location parameters mode, median and mean can be calculated.
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