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S3 Edexcel Central Limit Theorem Exercise 3D question 11

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Reply 20
Original post by Nikhilm
From the attachment, P(X < 110) = 0.9. I will call this value x

and P(X > 110) = 0.1. I will call this value y.

Hence, x = 1-y , i.e. P(X < 110) = 1 - P(X > 110)

Same thing I did for my answer no?


definitely not !!
there reason I did so is because the probability is less than 0.5, no tables for that
look at another example where the probability is over 0.5 like in your example
Original post by TeeEm
definitely not !!
there reason I did so is because the probability is less than 0.5, no tables for that
look at another example where the probability is over 0.5 like in your example


OMG I'm such an idiot!!!


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Original post by TeeEm
definitely not !!
there reason I did so is because the probability is less than 0.5, no tables for that
look at another example where the probability is over 0.5 like in your example


Thank you so much, will rep when I'm on my computer!


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Reply 23
Original post by Nikhilm
Thank you so much, will rep when I'm on my computer!


Posted from TSR Mobile


all the best !!

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