CA Foundation · Quantitative Aptitude · Statistical Description of Data
Which of the following variables is measured on a ratio scale?
Monthly salary in rupees is measured on a ratio scale because it has a true zero and ratios make sense, such as ₹60,000 being twice ₹30,000. Employee codes are nominal, grades are ordinal, and calendar years are interval with an arbitrary zero.
- AMonthly salary of an employee in rupeesCorrect
- BEmployee code number given to each staff member
- CGrade of an employee as A, B or C
- DYear of joining of an employee
Explanation
Salary has a true zero (no income) and ratios are meaningful, so ₹60,000 is twice ₹30,000. Employee codes are nominal labels, grades are ordinal, and calendar year has an arbitrary zero, making it interval.
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