Xin wen

Hey guys,

 

how do you calculate composite index if there are no weightage in the first place?

 

well, let's see the question

 

12. The table below shows the monthly expenditure of Ramli's family in the year 1992 and the price index for the year 1995 using 1992 as the base year

 

Calculate the composite index number for the monthly expenditure of Ramli's family, correct to the nearest integer.

 

I'm trying like this:

 

[math] CI = \frac{130 + 125 + 110 + 105}{4} [math] for assuming that each one has 1 weightage

 

unfortunately, it doesn't work.... the real answer = 122, while my answer = 117.5

 

thnx for anyone help!

 

P.S. actually I thought it should be "the given answer in error", but then it's not when I'm wrong again for question 13. =s