Consider the following time series data.

Week	1	2	3	4	5	6
Value	20	13	16	10	18	14

Using the nave method (most recent value) as the forecast for the next week, compute the following measures of forecast accuracy:

A. Mean absolute error (MAE)

B. Mean squared error (MSE)

C. Mean absolute percentage error (MAPE)

Round your answers to two decimal places.

MAE =

MSE =

MAPE =

Using the average of all the historical data as a forecast for the next period, compute the same three values. Round your answers to two decimal places.

MAE =

MSE =

MAPE =