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Need help to calculate Chi Square Test for Volume Vs No of Publication

Dear All,

I need help to calculate Chi Square Test for Volume wise papers published. Can you please help me with formula.

Thanks in advance

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Chi-square test for what?

Goodness to fit or testing a hypothesis?

The formula for Chisquare test is 

X2=(Observed frequency – Expected Frequency)2
                       Expected Frequency

Sir I was just referring the below piece of article, I was just unable to understand the formula used to calculate.

I tried to calculate but got the X2=5.37 using the formal you mentioned.

It will be grt if you can elaborate the steps for me.

Thanks...

thank you 

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