What's going wrong with the use of my 'measure of goodness of fit' formulas?

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This question regards goodness of fit (Chi-squared distribution)

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Your algebra is fine. The problem is that your values for $E_i$ are incorrect!

If you check, you will find that $\Sigma O_i=200$ and $\Sigma E_i=199.92$

You have a problem because in your case $\Sigma O_i \ne \Sigma E_i$

I think an error has ben made in the "$\ge 2$" column. I guess the value for $E_i$ should read $25.04$ instead of $24.96$