00:01
So here we are talking about inflation, right? so first of all, we know that 2012 is the base year.
00:07
So we know that the cpi in 2012 has to equal 100 by definition, right? we also know that the price of the basket in 2012 that actually makes up the cpi was 77.
00:21
The basket in 2013 was 82 and the basket in 2014 was 14 was 182 and the basket in 2014 was equal to 90.
00:31
So the value of the cpi in 2014 was what? well, first of all, right, the idea is that the cpi reflects the rate of change.
00:46
So first of all, let's find what the cpi is in 2014 by thinking about the rate of change, right? this rate of change is going to be equal to the basket in 2014 minus the basket in 2012, all over the basket in 2012.
01:05
So we get 90 minus 77 over 77.
01:10
You run and at least i will run and slam that into my calculator.
01:14
And i get 0 .169, or if you prefer, 16 .9 percent.
01:25
Inflation, right, and this is the cumulative inflation over these two years, right? we are looking at how much the basket cost in 2014 versus 2012.
01:42
The same goods means that the only change in the price of the basket was due to inflation.
01:48
So based on this basket measure, we assume that we calculate that inflation was 16 .9...