How To Find Seasonal Index ((new)) -

Multiply each of your average ratios by this factor to get your . Why This Matters: Deseasonalization

Overall average = (100 + 120 + ... + 200 + 110 + ...) / 24 = 130 how to find seasonal index

Now that you have a "smoothed" trend line (the CMA), you want to see how much your actual data points fluctuate around it. Ratio = (Actual Value / CMA) Multiply each of your average ratios by this

To get a single number for December, we simply take the average of these ratios. $$ \textUnadjusted Index = \frac1.42 + 1.482 = 1.45 $$ how to find seasonal index