Math, asked by hemanagendra, 9 months ago

Confidence intervals and Hypothesis testing :: Duracell manufactures batteries that the CEO claims will last n average of 300hrs on normal use. A researcher randomly selected 20 batteries from the production line and tested these batteries. The tested batteries ahve a mean life of 270 hours with a standard deviation of 45 hours. Do we have enough evidence to suggest that the claim of an average lifetime of 300 hours is false?

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Answered by RayaanPikachu
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