A consumer magazine wants to compare the lifetimes of ballpoint pens of three different types. The magazine takes a random sample of pens of each type and the lifetimes are reported in the following table. Analyze using alpha=.01. Need a walkthrough for Minitab.
| Brand1 |
Brand2 |
Brand3 |
| 260 |
181 |
238 |
| 218 |
240 |
257 |
| 184 |
162 |
241 |
| 219 |
218 |
213 |