i. The irregular component of a time series is the easiest to measure. ii. The ratio-to-moving average method removes the time series trend component, resulting in 12 numbers that are called specific seasonals.
iii. For a quarterly time series, the initial step, using the ratio-to-moving average method, is to remove the seasonal components from the time series using a 3-month centered moving average.
A) (i), (ii), and (iii) are all correct statements.
B) (i) and (ii) are incorrect statements but (iii) is correct.
C) (i) and (iii) are correct statements but not (ii).
D) (ii) and (iii) are correct statements but not (i).
E) (i), (ii), and (iii) are all false statements.

Question

Quizplus · Accepted Answer

The Answer of i. The irregular component of a time series is the easiest to measure. ii. The ratio-to-moving average method removes the time series trend component, resulting in 12 numbers that are called specific seasonals.
iii. For a quarterly time series, the initial step, using the ratio-to-moving average method, is to remove the seasonal components from the time series using a 3-month centered moving average.
A) (i), (ii), and (iii) are all correct statements.
B) (i) and (ii) are incorrect statements but (iii) is correct.
C) (i) and (iii) are correct statements but not (ii).
D) (ii) and (iii) are correct statements but not (i).
E) (i), (ii), and (iii) are all false statements.

I the Irregular Component of a Time Series Is the Easiest