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# S2 Continuity Correction Watch

1. Right, I know these is a continuity correction when using the Normal Approximation to the Binomial Distribution, but I never know if it is +/- 0.5

Does anyone have a general rule of thumb?

Thanks,
Sora
2. (Original post by Sora)
Right, I know these is a continuity correction when using the Normal Approximation to the Binomial Distribution, but I never know if it is +/- 0.5

Does anyone have a general rule of thumb?

Thanks,
Sora
The way I thought about it was, you're always trying to MAXIMISE the range.
3. (Original post by uniphysics)
The way I thought about it was, you're always trying to MAXIMISE the range.
I just did a question and it was P(X>15), so I used 14.5 not 15.5 which was wrong.
4. (Original post by Sora)
I just did a question and it was P(X>15), so I used 14.5 not 15.5 which was wrong.
I think of the discrete value 15 corresponds to the continuous values 14.5 to 15.5.

So > 15 becomes >= 15.5
>= 15 becomes >= 14.5

< 15 is <= 14.5

<= 15 is <= 15.5
5. A picture
6. Brilliant, thanks both of you
7. (Original post by Sora)
I just did a question and it was P(X>15), so I used 14.5 not 15.5 which was wrong.
Heyy sorry for the delay, so basically, the smallest value X can take is 16. Now to maximise the range, we can make that 15.5 instead of 16. To be honest, I think the post above sums it up perfectly

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