The Following Table Includes the Information About a Monthly Time

Multiple Choice

The following table includes the information about a monthly time series. When the exponential smoothing method with α = 0.1 and α = 0.5 is applied, what is the speed of decline for which the mean square error is better? What is this mean?

A) α = 0.5 and MSE = 13.67.
B) α = 0.1 and MSE = 13.67.
C) α = 0.5 and MSE = 10.41.
D) α = 0.1 and MSE = 10.41.