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Angel_Kitty12

  • one year ago

Can someone please help me? The Normal Distribution (Algebra 2) LIGHT BULBS: The time that a certain brand of light bulb last before burning out is normally distributed. About 2.5% of the bulbs last longer than 6800 hours and about 16% of the bulbs last longer than 6500 hours. How long does the average bulb last?

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  1. anonymous
    • one year ago
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    lol ok thats says that your 2nd standard deviation starts at 6800 and 1st starts at 6500

  2. anonymous
    • one year ago
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    your mean would be 6200

  3. anonymous
    • one year ago
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    do you understand why??

  4. anonymous
    • one year ago
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    @Angel_Kitty12

  5. Angel_Kitty12
    • one year ago
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    @Musicdude Really sorry my phone was acting up are you still willing to help me?

  6. anonymous
    • one year ago
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    yea

  7. Angel_Kitty12
    • one year ago
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    Okay thanks so much and yea I got the mean of 6200 but that can't be the answer is it?

  8. anonymous
    • one year ago
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    yea it is because the average is the mean

  9. anonymous
    • one year ago
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    so an average lightbulb would last 6200 hours

  10. anonymous
    • one year ago
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    cool?

  11. Angel_Kitty12
    • one year ago
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    Wow really..Cause usually it's a whole bunch of other steps...oh wow. God thanks so much :)

  12. anonymous
    • one year ago
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    no problem

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