Given a Sequence
, an -moving average is a new sequence
the by taking the Average of subsequences of terms,
See also Average, Spencer's 15-Point Moving Average
Kenney, J. F. and Keeping, E. S. ``Moving Averages.'' §14.2 in Mathematics of Statistics, Pt. 1, 3rd ed.
Princeton, NJ: Van Nostrand, pp. 221-223, 1962.