Thank you, here is little more data; I used chi-square (χ2) test to investigate the statistical significance of differences of opinion about the students offered the choice of extra-curricular activities with regard to gender and school achievement, ie the most recently completed assessment of...
In one case I get the results as a significant difference in the other with the same dana, the difference is not significant.
Data sample
A B
I 5 8
II 4 28
http://imageshack.com/a/img542/467/o61k.jpg
Same data and got significant difference...