Irregular variations in a time series are caused by:

A. Floods

B. Natural calamities

C. Labour strike

D. Climate changes

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Match the LIST-I with LIST-II

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Given $\sum p_0 q_0 = 800$, $\sum p_0 q_1 = 1500$, $\sum p_1 q_1 = 1300$ and $\sum p_1 q_0 = 900$, where subscripts 0 and 1 are used for base year and current year respectively. The Paasche's index number is:

For a given data of 5 observation $\sum y = 311$, $\sum x^2 = 10$ and $\sum xy = 90$. The equation of the trend line is :

The components of time-series are

A. Seasonal component

B. Reverse component

C. Cyclic component

D. Irregular component

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If Paasche's index number is 160 and Laspeyre's index number is 250, then Fisher's index number is :

The price relatives and weights of a set of commodities are given as:

If the sum of weights is 30 and the index for the set is 144, then the values of $x$ and $y$ are: