Solution-Population standard deviation

Population standard deviation

Reference no: EM131087369

If the manager of a paint supply store wants to estimate, with 95% confidence, the mean life of light bulbs to within +/-20 hours and also assumes that the population standard deviation is 100 hours, how many light bulbs need to be selected?

Reference no: EM131087369

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Population standard deviation : If the manager of a paint supply store wants to estimate, with 95% confidence, the mean life of light bulbs to within +/-20 hours and also assumes that the population standard deviation is 100 hours, how many light bulbs need to be selected?

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Population standard deviation

Reference no: EM131087369

Reference no: EM131087369

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