Question

Using polynomial regression fit a cubic equation to the following data: x 3 4 5 7 8 9 11 12 y 1.6 3.6 4.4 3.4 2.2 2.8 3.8 4.6 Plot the data and the cubic equation. Along with the coefficients, determine r2 and sy/x.

Answer 1

As problem is of regression analysis,thus r^2 will be 24 and sy/x is 4.