Working out percentage change from the base period is then simple.
Working out percentage change from the base period is then simple.
Working out percentage change from the base period is then simple.
Working out percentage change from the base period is then simple.
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index is the same as power The index of a number say how many times you have to use the number in a multiplictaion. e.g; 2 10 = 10*10=100
Index numbers are usually expressed by setting some selected value as 100 and converting all other numbers to an index relative to that base.So, for a simple index, if the value y(0) is set to 100, then the index for the value y(k) is y(k)/y(0)*100.The calculations become more complicated if the index is for a collection of items. In such cases, a number of different "sub-indices" need to be combined together. The combined index is calculated as a weighted average of the component sub-indices, with the weights based on the importance of each su-index in the base period (base-weighted) or in the current period (current-weighted).
If you have the x-th percentile, the index from a sample of size n that corresponds to it is k := max { i - natural | i <= x*n/100 }. Algorithmically, this is to sort the array and take the element k := floor(x*n/100).
Divide the price of the commodity in the given year by the price of the commodity the year before. Then, multiply that number by 100.