a) The manufacturer wants to be certain that the mean battery life exceeds 25h. What conclusions can be drawn from these data (use alpha = 0.05)
b) Construct a 90% two-sided confidence interval on mean life in the accelerated test.
Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.
Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!