Mathematics, 24.01.2020 22:31 MarlonJ02
The lives of certain extra-life light bulbs are normally distributed with a mean equal to 1350 hours and a standard deviation equal to 18 hours1. what percentage of bulbs will have a life between 1350 and 1377 hr? 2. what percentage of bulbs will have a life between 1341 and 1350 hr? 3. what percentage of bulbs will have a life between 1338 and 1365 hr? 4. what percentage of bulbs will have a life between 1365 and 1377 hr?
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