Motor Oil Sales

True/False

Motor Oil Sales
As part of an effort to forecast future sales,the monthly motor oil sales (in thousands of gallons)for the past 10 months are recorded.These data are shown below. ​ ​
-In determining weekly seasonal indexes for natural gas consumption,the sum of the 52 means for gas consumption as a percentage of the moving average is 5195.To get the seasonal indexes,each monthly mean is to be multiplied by (5200 / 5195).