Lendright is considering investing in a company that manufactures snow chains and helping it fund a new production plant to cope with growing demand as average temperatures continue to fall across...

Lendright is considering investing in a company that manufactures snow chains and

helping it fund a new production plant to cope with growing demand as average temperatures continue to fall across Europe.

(a) Calculate the trend line using the moving average method.

(b) Plot the original data and the trend values on a scatter diagram.

(c) Estimate and then eliminate the season variation component. In other words, find the de-seasonalised data.

(d) Find the least squares (regression) line to fit the trend values and forecast sales in 2015,