Degrees of Freedom and probability?! Watch
Basically, I don't get it. Help?
What bit are you particularly stuck on?
Degrees of freedom is the number of classes minus 1. You use your value of chi squared and locate it in the table corresponding to the degrees of freedom you have. If it helps, in every past paper iv done so far my chi squared value hasn't actually appeared in the table and the probability i have to give is less than 0.001
If the value is less then the critical at 0.05 then the value is significant and you reject the hypothesis that the occurrence is due to chance, its usually due to linkage. Does that help at all?
Does that make any sense?