Question
The manufacturer of a battery pack for a laptop company claims that the battery can function for an average of 8 hours before being recharged.
The manufacturer of a battery pack for a laptop company claims that the battery can function for an average of 8 hours before being recharged. A random sample of 64 battery packs were selected and tested. The mean was 6 hours and the standard deviation was 1.8 hours.
Find the LOWER interval for the 95% CI for the true average battery life. Use three decimal places.
Find the UPPER interval for the 95% CI for the true average battery life. Use three decimal places.
Based on the CI that you found, can the manufacturer claim that the battery life truly is 8 hours?
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A First Course in Differential Equations with Modeling Applications
Authors: Dennis G. Zill
11th edition
1305965728, 978-1305965720
