I'm not totally confident, but I think the mid-point makes the most sense. The moving average is meant to smooth out the data, so it shouldn't be at the beginning or end of the period.
I'm leaning towards B, since the moving average is meant to reflect the current state of the data. Placing the points at the end of the period makes the most sense to me.
The key here is to remember that a moving average is meant to smooth out the data, so the points should be centered on the period they represent. I'm going with A.
Ah, the age-old debate of where to place moving average points. It's like deciding where to put the 'X' on a treasure map - the end, the middle, or just randomly scattered about?
The correct answer is definitely B. The plotted points of a moving average should be at the end of the period to which they apply. That's the whole point of a moving average - to show the trend at the most recent data point.
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