QUESTION 13

When the underlying mean of a time series is very stable and there are no trend, cyclical, or seasonal influences:

		a simple moving-average forecast with n = 3 should outperform a simple moving-average forecast with n = 15.
		an exponential smoothing forecast with a = 0.30 should outperform a simple moving-average forecast with = 0.01.
		a simple moving-average forecast with n = 20 should perform about the same as a simple moving-average forecast with n = 3.
		a simple moving-average forecast with n = 20 should outperform a simple moving-average forecast with n = 3.