Reference no: EM133012159

Problem 1: In a decomposition model, which of the following statements about the original moving average (OMA) and the centred moving average (CMA) is true?

Select one:

a. The OMA is not a forecast of the time series whereas the CMA is a forecast of the time series

b. The OMA is required no matter the seasonal periodicity whereas the CMA is only required for odd seasonal periodicity

c. The OMA is required no matter the seasonal periodicity whereas the CMA is only required for even seasonal periodicity

d. The OMA contains no seasonal and random components whereas the CMA has random components

e. Both c. and d. are true