Problem 18-13
Historical demand for a product is as follows:
DEMAND
April 62
May 57
June 82
July 62
August 87
September 82
a. Using a simple four-month moving average, calculate a forecast for October. (Round your answer to 2 decimal places.)
Forecast for October
b. Using single exponential smoothing with α = 0.10 and a September forecast = 56, calculate a forecast for October. (Round your answer to 2 decimal places.)
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. (Round your intercept value to the nearest whole number and slope value to 2 decimal places.)
Y = + t
d. Calculate a forecast for October using your regression formula. (Round your answer to 2 decimal places.)
Forecast for October