in a test on 200 electric bulbs , it was found that life particular make,was normally distributed with an average life of 2040 hours standard deviation of hours estimate the number of bulbs likely to burn for i) more than 2140hrs ii)between 1920 and 2080 hours iii)less than 1960 hours
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9th Jun, 2020
Hello Aspirant!
I am providing you with the link that will help you in getting detailed solution of the question you asked. Feel free to reach me out for any other query by simply replying to this comment.
https://hemantmore.org.in/mathematics/statistics/normally-distributed/14360/
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