Hi Patricia... can't thank you enough for such easy n wonderful way of summarisation n explanation of both concepts... Jst had 1 doubt, how can we verify if some data is relevant to be calculated by this method? N also require your advice if I can use 2 variable chi square method to analyse data of Scale rating from 1-5 with an occupation wise data consisting of salaried n self employed.... i.e. On 1 end rating score 1 2 3 4 5 vs occupation Salaried Self employed is tabulated? Pls advice. Ty.