The average usage time of 13 batteries selected from among the batteries produced in a factory has been calculated as 78

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answerhappygod
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The average usage time of 13 batteries selected from among the batteries produced in a factory has been calculated as 78

Post by answerhappygod »

The average usage time of 13 batteries selected from among the
batteries produced in a factory has been calculated as 78, and the
standard deviation of the usage times as 4.3 hours. Test this claim
at the 0.05 significance level.
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