Seasonal index
Process Improvement and Median Changes
July 9, 2019Process Improvement: Find UCL and LCL for charts
July 9, 2019In determining monthly seasonal indexes for gas consumption, the sum of the 12 means for gas consumption as a percentage of the moving average is 1150. To get the seasonal indexes, each of the 12 monthly means is to be multiplied by:
a. 1200 / 1150
b. (1200 + 1150) / 12
c. (1150 + 12) / 1200
d. 1150 / 1200
In determining monthly seasonal indexes for gas consumption, the sum of the 12 means for gas consumption as a percentage of …
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