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Mathematics, 31.03.2020 03:43 emwemily
Question 1.05 It is known from past experience that the life of traffic light bulbs is normally distributed with a standard deviation of 250 hours. In a study, if you wanted the total width of the two-sided confidence interval on mean to be 120 hours at 90% confidence, how many light bulbs should be selected for the study
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Question 1.05 It is known from past experience that the life of traffic light bulbs is normally dist...
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