Could anyone lend me advice on the best way to approach a double moving average using Minitab 15?

Please clarify. Do you mean a moving average with a sample size of 2?

A quick websearch indicates that a "double moving average" is a moving average of a moving average.

It would then seem that the simplest solution is to do a moving average and store the results in the new column. (Use the Stat/Time Series/Moving Average menu. And select the "Storage" option). Then repeat the process using the column with the moving average results as the input for the second calculation.

Is this what you are looking for?


Tim F

This appears to used for forecasting. Minitab has an option under Time Series analysis for double exponential smoothing. The intent of this procedure appears to be similar to double moving average. Otherwise Tim's suggestion appears to be your only option.