I a Typical Monthly Seasonal Index of 107

Multiple Choice

i. A typical monthly seasonal index of 107.0 indicates that sales (or whatever the variable is) are 7
Percent above the annual average.
ii. 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.
iii. In the final step, using the ratio-to-moving-average method on quarterly data, the total of the
Modified means should theoretically be equal to 400 because the average of should be 100.

A) (i) , (ii) , and (iii) are all correct statements.
B) (i) and (ii) are correct statements but not (iii) .
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.