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Two brands of car batteries, both carrying 6-year warranties, were sampled and tested under controlled conditions. Five of each brand failed after the number of months shown. Calculate a) both sample means and b) both sample standard deviations. Decide c) which brand battery lasts longer and d) which brand has the mor consistent lifetime. Brand A 73, 67, 70, 72, 71 O Brand B: 70, 64, 71, 72, 66 .... a) What are the sample means? XB b) What are the sample standard deviations? SA= (Round to the nearest hundredth as needed.) c) Which brand battery apparently lasts longer? Brand B Brand A d) Which brand battery has the more consistent lifetime? Brand A Brand B

Two brands of car batteries, both carrying 6-year warranties, were sampled and tested under controlled conditions. Five of each brand failed after the number of months shown. Calculate a) both sample means and b) both sample standard deviations. Decide c) which brand battery lasts longer and d) which brand has the mor consistent lifetime. Brand A 73, 67, 70, 72, 71 O Brand B: 70, 64, 71, 72, 66 .... a) What are the sample means? XB b) What are the sample standard deviations? SA= (Round to the nearest hundredth as needed.) c) Which brand battery apparently lasts longer? Brand B Brand A d) Which brand battery has the more consistent lifetime? Brand A Brand B

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Two brands of car batteries, both carrying 6-year warranties, were sampled and tested under controlled conditions. Five of each brand failed after the number of months shown. Calculate a) both sample means and b) both sample standard deviations. Decide c) which brand battery lasts longer and d) which brand has the more consistent lifetime. Brand A 73, 67, 70, 72, 71 D Brand B: 70, 64, 71, 72, 66 a) What are the sample means? b) What are the sample standard deviations? SA= (Round to the nearest hundredth as needed.) c) Which brand battery apparently lasts longer? Brand B Brand A d) Which brand battery has the more consistent lifetime? Brand A Brand B O Time Remaining: 01:35:33 Next 75°F
Transcribed Image Text:Two brands of car batteries, both carrying 6-year warranties, were sampled and tested under controlled conditions. Five of each brand failed after the number of months shown. Calculate a) both sample means and b) both sample standard deviations. Decide c) which brand battery lasts longer and d) which brand has the more consistent lifetime. Brand A 73, 67, 70, 72, 71 D Brand B: 70, 64, 71, 72, 66 a) What are the sample means? b) What are the sample standard deviations? SA= (Round to the nearest hundredth as needed.) c) Which brand battery apparently lasts longer? Brand B Brand A d) Which brand battery has the more consistent lifetime? Brand A Brand B O Time Remaining: 01:35:33 Next 75°F
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