A. A single, constant base period for all comparisons
B. A different base period for each time point
C. The immediately preceding period as the base for each calculation
D. Geometric mean of multiple base periods
Answer: Option A
Solution (By JKSSB Mock Tests)
Fixed base index selects one period as the base (index=100) and expresses all other periods relative to it, enabling consistent long-term trend analysis without base drift.
Assertion (A): Mailed questionnaire method is suitable when the informants are illiterate. Reason (R): Mailed questionnaire does not require any personal interaction. Choose the correct option:
A.A is false, R is true
B.A is true, R is false
C.Both A and R are true, but R is not the correct explanation of A
D.Both A and R are true, and R is the correct explanation of A
Explanation:
Mailed questionnaire is unsuitable for illiterates because they cannot read/write. The reason (no personal interaction) is true but does not make it suitable for illiterates; in fact, it makes it worse.
Explanation:
CPI covers a broader basket including consumer services (healthcare, education, transport), while WPI focuses mainly on goods, making CPI more comprehensive for cost-of-living assessment.
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