computer company claims that the lifespan of its batteries is less than 6 years. The population standard deviation is 0.9 years. A sample of 55 batteries was tested, and their mean lifespan was 5.8 years. Using a 90% confidence level, determine if the company's claim is correct.

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computer company claims that the lifespan of
its batteries is less than 6 years. The population
standard deviation is 0.9 years. A sample of 55
batteries was tested, and their mean lifespan
was 5.8 years. Using a 90% confidence level,
determine if the company's claim is correct.
Transcribed Image Text:computer company claims that the lifespan of its batteries is less than 6 years. The population standard deviation is 0.9 years. A sample of 55 batteries was tested, and their mean lifespan was 5.8 years. Using a 90% confidence level, determine if the company's claim is correct.
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