Question: You are given a time series with data about sales over 1 3 years, with one data point per day. You observe that, every 2

You are given a time series with data about sales over

13

years, with one data point per day. You observe that, every

26

weeks, there is a peak in sales that slowly decreases until the next

26

weeks period. You decide to use a moving average to calculate the trend of sales while smoothing the seasonality. What would be the most appropriate period for the moving average? In other words, how many data points should be used to calculate each value of the moving average?

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