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life test performed on a sample of 100 batteries indicated(1)-average life of 75 months (2)-a stander deviation of 5 months (3)-appeal shaped batteries life distribution
life test performed on a sample of 100 batteries indicated(1)-average life of 75 months (2)-a stander deviation of 5 months (3)-appeal shaped batteries life distribution approximately of 95%of the batteries will last between --------and ------
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