Students in a business statistics course performed a completelyrandomized design to test the strength of four brands of trashbags. One-pound weights were placed into a bag, one at a time,until the bag broke. A total of 40 bags, 10 for each brand, wereused. The data in give the weight (in pounds) required to break thetrash bags. Dataset: Trashbags
- At the 0.05 level of significance, is there evidence of adifference in the mean strength of the four brands of trashbags?
- If appropriate, determine which brands differ in meanstrength.
- At the 0.05 level of significance, is there evidence of adifference in the variation in strength among the four brands oftrash bags?
| Kroger | Glad | Hefty | TuffStuff |
| 34 | 32 | 33 | 26 |
| 30 | 42 | 34 | 18 |
| 40 | 34 | 32 | 20 |
| 38 | 36 | 40 | 15 |
| 36 | 32 | 40 | 20 |
| 30 | 40 | 34 | 20 |
| 30 | 36 | 36 | 17 |
| 42 | 43 | 34 | 18 |
| 36 | 30 | 32 | 19 |
| 38 | 38 | 34 | 20 |
