In the final step,using the ratio-to-moving-average method,the total of the 12 modified means should theoretically be equal to 12.00 because the average of the 12 months is designated as 1.00.

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In the ratio-to-moving-average method, the modified means (or seasonal indices) are adjusted so that their sum over one cycle (e.g., 12 months for monthly data) equals the number of periods in the cycle (12 in this case), ensuring that the average is 1.00. This normalization ensures that the seasonal factors average out to 1 over the cycle, maintaining the original scale of the data.

In the Final Step,using the Ratio-To-Moving-Average Method,the Total of the 12