S2 Normal Approximation Question
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S2 Normal Approximation QuestionHey, so i've been doing a past paper for Edexcel S2 and i came accross this question:
The random variable T has the normal distribution N(25, 5^2).
(c) Find P(T ≤ 18).
I went and did this question but on the mark scheme, no continuity correction was shown and im not sure why
it just did (18 - 25) / 5
Any idea why that may be? or is the mark scheme wrong?
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Re: S2 Normal Approximation QuestionIt doesn't look like they're approximating T from a discrete distribution to a continuous distribution. They've defined T as having a continuous distribution, so there is no need for a continuity correction.
Last edited by Zhy; 05-04-2012 at 15:11. -
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Re: S2 Normal Approximation Questionoh yeah LOL im silly, i shoulda realised that. Thanks for the help(Original post by Zhy)
It doesn't look like they're approximating T from a discrete distribution to a continuous distribution. They've defined T as having a continuous distribution, so there is no need for a continuity correction.
