Match List-I with List-II
| List-I | List-II | ||
| Example | Time-series component | ||
| (A) | Labour strike | (I) | Secular-trend |
| (B) | Continuous decline in death rate | (II) | Seasonal |
| (C) | Rise in prices before Diwali | (III) | Cyclical |
| (D) | Rise and fall of the share-market | (IV) | Irregular |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
The four components of a time series are: the secular trend (a smooth long-term movement in one direction), seasonal variation (a pattern that repeats at the same time every year), cyclical variation (up-and-down swings, booms and slumps, lasting more than a year) and irregular variation (random, unforeseen events).
(A) Labour strike
This matches (IV) Irregular: a strike is an unforeseen, one-off event.
(B) Continuous decline in death rate
This matches (I) Secular-trend: it is a steady long-term movement in one direction.
(C) Rise in prices before Diwali
This matches (II) Seasonal: it happens at the same time every year.
(D) Rise and fall of the share-market
This matches (III) Cyclical: the market moves through alternating phases of rise and fall. Once (A), (B) and (C) are matched, Option (1) is also the only option left.
So the matching is (A)-(IV), (B)-(I), (C)-(II), (D)-(III).
CBSE Applied Mathematics (Class XII):
Time Series Analysis
