Run linear regression and display r

01

Press these keys

MODESTAT DIAGNOSTICS:ONSTATCALCLinReg(ax+b)

02

Walkthrough

1
Enable diagnostics
In MODE set STAT DIAGNOSTICS: ON so r and r² are displayed.
2
Calculate
STAT → CALC → LinReg(ax+b), Xlist L1, Ylist L2; optionally store to Y1.
3
Interpret
a is slope, b is intercept, r measures linear association and r² the explained proportion in the model.

03

Worked example

Fit the points (1,3),(2,5),(3,7),(4,9).

NORMAL FLOAT AUTO REAL MPa=2b=1r=1r²=1

Answerŷ=2x+1 with perfect positive linear correlation for these points.