Dear JMP Community,
I have a question for your advise.
Case Study:
1. We are measuring the surface contour of an object.
2. The object is 150 cm long.
3. There are 2 measurement method, called (Method A) & (Method B).
Below is a simple graph showing:
X-Axis (Discreet Integer) = The object length.
Y-Axis (Continuous Data) = The measurement of object contour (measured at each increment of X).
![Graph.jpg Graph.jpg](https://community.jmp.com/t5/image/serverpage/image-id/30822iD812BA1444A6A891/image-size/large?v=v2&px=999)
Questions:
How do I check check if there is any statistical difference between these 2 trend lines?
Take note, here we cannot do statistical test on 2 groups of data (on the measurement results alone between Method A &B) , since the data is tied to the specific length of the objects.
For example :
If the object surface is totally flat, the trend line recorded by both method (A and B) should be a flat line.
In my case, the object is curve (smiley face), so both method (A and B) shows a curve as in the graph.
Is there a method to check statistical difference for 2 or more non-linear trend lines?
Appreciate your thoughts on this. Thanks a lot.
B.r,
Chris