T-shirt sales: aggregating
Your first attempt at forecasting wasn't great (a very high MASE of 0.97) but you know how you can improve it. You tell your manager that weekly sales are subject to a lot of variation, making it hard to predict them. Aggregating data to the quarterly level will smooth them out, leading to a more accurate forecast. You decide to do this for each of the T-shirt sizes.
If you lost progress, load the workbook 4_2_granularity.twbx
from the Workbooks folder on the Desktop.
This exercise is part of the course
Statistical Techniques in Tableau
Hands-on interactive exercise
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