A manufacturer of batteries claims its batteries last an average of 7 hours when used in a particula
Question: A manufacturer of batteries claims its batteries last an average of 7 hours when used in a particular toy. For a sample of 20 batteries, the mean life was 6.5 hours and the standard deviation 1.5. Can we conclude with 95% certainty that the mean life for all batteries of that brand is less than 7 hours?
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Deliverables: Word Document
Deliverables: Word Document
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