Paper 1 · Research Aptitude
UGC NET June 2023 (16.06.2023) Shift-II
Which of the following types of variables would have a true zero point?
ANominal
BOrdinal
CInterval
DRatio ✓ Correct
Correct answer: (D) Ratio — A ratio variable has a true zero point, so the answer is ratio.
Explanation
★A ratio variable has a true zero point, so the answer is ratio.
★A ratio variable is measured on a continuous scale with a meaningful absolute zero.
★At its zero the quantity is genuinely absent, as with weight, height, age or income.
★This true zero lets ratios such as twice as heavy be meaningful.
★A nominal variable only names categories and has no order or zero.
★An ordinal variable ranks values but has no equal intervals or true zero.
★An interval variable has equal intervals but only an arbitrary zero, as in Celsius temperature.
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