A data set has been observed to demonstrate seasonality and the three previous yearly January values were 130, 200, and 120. The average over all months is 150. The approximate seasonal index for January is therefore
A) 0.867
B) 1.667
C) 0.800
D) 1.000

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The Answer of A data set has been observed to demonstrate seasonality and the three previous yearly January values were 130, 200, and 120. The average over all months is 150. The approximate seasonal index for January is therefore
A) 0.867
B) 1.667
C) 0.800
D) 1.000

A Data Set Has Been Observed to Demonstrate Seasonality and the Three