5. ANOVA A consumer magazine wants to compare the lifetimes of ballpoint pens of three different types. Does the data indicate that there is a difference in the mean lifetime of the three brands. Brand 1        Brand 2         Brand 3 260                   181               238 218                   240                257 184                   162               241 219                    218             213 Hypothesis Ho: .Ha: Decision Conclusion

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5. ANOVA
A consumer magazine wants to compare the lifetimes of ballpoint pens of three different types.
Does the data indicate that there is a difference in the mean lifetime of the three brands.
Brand 1        Brand 2         Brand 3
260                   181               238
218                   240                257
184                   162               241
219                    218             213
Hypothesis
Ho:
.Ha:
Decision
Conclusion

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