The chi-square p value is showing BMI of students is independent of their snack eating habit but Cramer's V shows some association in BMI level and snack eating habit. Why are the results of the two tests different?
> t=table(data$BMI,data$habit)
> t
No Yes
Abnormal 19 13
Normal 59 17
> assocstats(t)
X^2 df P(> X^2)
Likelihood Ratio 3.5994 1 0.057801
Pearson 3.7412 1 0.053086
Phi-Coefficient : 0.186
Contingency Coeff.: 0.183
Cramer's V : 0.186