Physics, 21.06.2020 02:57 obalzano6817

The lifetimes of light bulbs are normally distributed with a mean of 1490 hours and a standard deviation of 150 hours
1. Determine the proportion of light bulbs lasting less than 1380 hours. Round your answer to 4 decimal
places
2. The longest lasting 5 percent of light bulbs last_hours or more. Round your answer to 1 decimal
place
3. The middle 85 percent of light bulbs last between__and_hours. Round your answers to 1
decimal place
4. Determine the proportion of light bulbs lasting between 1310 and 1680 hours. Round your answer to 4
decimal places
5. Determine the proportion of light bulbs lasting more than 1680 hours. Round your answer to 4
decimal places
6. The shortest-lasting 10 percent of light bulbs last hours or less. Round your answer to 1
decimal place

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The lifetimes of light bulbs are normally distributed with a mean of 1490 hours and a standard devia...

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