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    Can someone help with part (b) please, I don't know what to do :confused:
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    (Original post by mica-lwe)
    Can someone help with part (b) please, I don't know what to do :confused:
    What does it mean for 85% of the first bounces to exceed a certain height? Where would this height roughly be on a normal distribution graph? Can you match it to a z value?
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    (Original post by SeanFM)
    What does it mean for 85% of the first bounces to exceed a certain height? Where would this height roughly be on a normal distribution graph? Can you match it to a z value?
    I've used inverse normal, put my values in and got 137.4, what notation do I use for this? All I have is a diagram and =137.4 on my page...
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    (Original post by mica-lwe)
    I've used inverse normal, put my values in and got 137.4, what notation do I use for this? All I have is a diagram and =137.4 on my page...
    You can do it then

    You may wish to call the height H and say that P(X>H) = 0.85.

    Then turn that H into a Z value, get rid of the probability sign on the left by picking the right z value that matches p(Z>z) = 0.85, and go on from there.
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    Thankyou!
 
 
 
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