@LeneStod I see the problem now. I think the question that if one curve equation is significantly different from the other is like asking if two numbers differ significantly. For example it will be hard to formulate what it means if I am asking if number 2 is significantly different from number 3. The significance (p value) comes into picture only if, at least, one side of the comparison operator has n number of members coming from a distribution. Taking both points into account I find it hard to understand what it means by comparing the p values of two equations (and not members). However just because I can not understand does not mean that your stated problem can not be formulated and answer. Let's hope one of the SAS experts land on this page and shed much better light on this topic than me.
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