Historical demand for a product is as follows:
D E M A N D
a . Using a simple four-month moving average, calculate a forecast for October.
b . Using single exponential smoothing with a= 0.2 and a September forecast = 65, calculate
a forecast for October.
c . Using simple linear regression, calculate the trend line for the historical data. Say the X axis
is April = 1, May = 2, and so on, while the Y axis is demand.
d . Calculate a forecast for October.
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