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zaq123321

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I also don't understand how did they get that.  When I tried
http://www.socscistatistics.com/tests/chisquare2/Default2.aspx
G1  24  (34.60)  [3.25]  54  (43.40)  [2.59]     78  
G2  25  (28.39)  [0.40]  39  (35.61)  [0.32]     64  
G3  33  (29.72)  [0.36]  34  (37.28)  [0.29]     67  
G4  28  (17.30)  [6.62]  11  (21.70)  [5.28]     39  
         
Column Totals  110  138     248  (Grand Total)  

The chi-square statistic is 19.1084. The P-Value is 0.00026. The result is significant at p < 0.05.

It gave different answer. Did you get the same result?
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