A 95% confidence interval for the mean difference (brand A – brand B) in the number of laps completed is (1.04, 4.96). Identify all statements that are correct.
a. We are 95% confident that the interval from 1.04 to 4.96 captures the true mean difference (brand A – brand B) in the number of laps completed.
b. It appears that brand A office chairs may help teams complete more laps than brand B chairs in official office-chair races.
c. It appears that brand B office chairs may help teams complete more laps than brand A chairs in official office-chair races.
d. We have proven that brand A chairs will help teams complete between approximately 1 and 5 more laps than if they were to use brand B chairs.