Hi

Using Excel Scatter Plot, choosing cubic regression equation

.

x	y	est	y-est	(y-est)^2

5	2	4	-2	4

3	4	4	0	0

4	7	7	0	0

6	4	4	0	0

5	6	4	2	4

				8/5=1.6

				sqrt(1.6)is the standard error of estimate

 

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