Compute the mean absolute percent error

Question

Assignment:

The number of transistors (in millions) made at a plant in Japan during the past five years follows:

Year   Transistors
 1         140
 2         160
 3         190
 4         200
 5         210

a. Forecast the number of transistors to be made next year, using linear regression.

b. Compute the mean squared error (MSE) when using linear regression.

c. Compute the mean absolute percent error (MAPE).