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Image relevant? Type of techniques Total

New technique Old technique

Yes 250 175 425

No 50 125 175

Total 300 300 600

I was using this distribution at http://davidmlane.com/hyperstat/chi_square_table.html but I am having trouble calculating the Chi Square value assuming the required p value is 0.01 and interpreting the result. Would someone be able to do this and explain how it was doing, or point to a decent tutorial? I only need this done, not to understand it, at least not past what is required.

Many thanks,

Lawrence