題組內容

5. (10%) A manager wants to test if different packaging (A, B, C, D) have an effect on coffee beans sale at supermarket. She randomly assigns each supermarket to one of the 4 packages and records packs of coffee beans sold in a one-week period.


The average coffee beans sold for all supermarkets in the week is 53 packs, and sum of square total (SST) is 1624.


(1) (5%) What is the sum of square between (among)?