Every flavor gets 180/5=36 flavors. x^2=∑(xi)^2/mi - n. In this case, mi is the proportion of the hypothesis, thus 36, n=180 and xi is the number of actual observations. Substituting the known quantities, we get that x^2=9. The degree of association is given by √X^2 / √N(n-1) . This yields around 0.10, much higher than our limit.
