Question 3 (4 points)

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For the data below, based on a 4 period moving average forecasting method calculate the following:

Year	Quarter	Sales
1	1	234
	2	194
	3	201
	4	156
2	1	158
	2	174
	3	202
	4	242
3	1	189
	2	162
	3	198
	4	210
4	1	201
	2	205
	3	216
	4	163
5	1	216
	2	156
	3	188
	4	246

1) Calculate the mean absolute error.ANSWER TO 2 DECIMAL PLACES

2) Calculate the mean square error. ANSWER TO 2 DECIMAL PLACES

3) Calculate the absolute percentage error.ANSWER AS A PERCENT TO 2 DECIMAL PLACES...INCLUDE UNITS (I.E. THE PERCENT SIGN)

4) Predict the the number of sales for the first quarter of year 6. ANSWER TO 0 DECIMAL PLACES

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