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To check the quality of two brands of light bulbs, their life in burning hours was estimated as under for 100 brand. Life (in hrs)Number of bulbs (Brand A)Number of bulbs (Brand B)0−5015250−100208100−1501860150−2002525200−250225Total100100 (i) Which brand gives higher life ? (ii) Which brand is more dependable ? |
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Answer» To check the quality of two brands of light bulbs, their life in burning hours was estimated as under for 100 brand. Life (in hrs)Number of bulbs (Brand A)Number of bulbs (Brand B)0−5015250−100208100−1501860150−2002525200−250225Total100100 (i) Which brand gives higher life ? (ii) Which brand is more dependable ? |
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