(2) (5%) To test if the variance of time spent watching TV is equal for male and female, what is the test statistics and what is your conclusion?

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. | packaging | number of supermarkets | mean | variance | | --- | --- | --- | --- | | A | 9 | 48 | 23.50 | | B | 9 | 50 | 39.00 | | C | 8 | 56 | 20.86 | | D | 8 | 59 | 44.57 | 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)?

(2) (5%) To test if the variance of time spent watching TV is equal for male and female, what is the test statistics and what is your conclusion?

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