Two brands of car​ batteries, both carrying​ 6-year warranties,were sampled and tested under controlled conditions. Five of eachbrand failed after the number of months shown. Calculate ​a) bothsample means and ​b) both sample standard deviations. Decide ​c)which brand battery lasts longer and ​d) which brand has the moreconsistent lifetime. Brand​ A: 68​, 69​, 76​, 76​, 73 Brand​ B:61​, 69​, 68​, 67​, 61
What are the sample​ means?A B
What are the sample standard​ deviations? SA SB
Which brand battery apparently lasts​ longer?BRAND A OR B
Which brand battery has the more consistent​ lifetime?BRAND A ORB
