CA Foundation · Quantitative Aptitude · Statistical Description of Data
A market researcher in Kochi records the following attribute of each customer: the brand of mobile phone owned (Samsung, Apple, Xiaomi, Vivo). On which scale of measurement is this variable recorded?
The brand of mobile phone is measured on the nominal scale. The brands are merely names used to classify customers into groups, with no natural ranking and no meaningful differences or ratios between them, so only counting of each category is possible.
- ANominal scaleCorrect
- BOrdinal scale
- CInterval scale
- DRatio scale
Explanation
Brand names are labels that only classify customers into categories. There is no natural order among the brands and no meaningful arithmetic, so the data are nominal. Ordinal would need a ranking among categories, which does not exist here.
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