Resource 9 - How-to Guide - Regression Analysis on a ...
How-to guide: regression analysis on a calculatorNote:This guide has instructions performed on a Casio FX-82AU calculator. Method may differ slightly on other calculators.Left, right, up or down instructions refer to the directions on the replay key.Part 1 – Enter regression analysis modePress:Mode22Part 2 – Enter dataImagine we wished to enter the following data:xy234569711Press:2=RightUp3=LeftRepeat for the other scores until all are entered. Use the left, right, up or down buttons to move around the columns.Once all pairs of data are entered, press AC.Part 3 – Obtaining Pearson’s correlation coefficientPress:Shift153=We obtain r=0.9880643635.Part 4 – The equation of the least squares line of best fitThe equation is of the form y=Bx+A.We can find each of the A and B values.To find the A value, press:Shift151=We obtain A=-0.72881325593.To find the B value, press:Shift152=We obtain B=1.627118644.Therefore, the equation is (after rounding each value to 4 decimal places):y=1.6271x-0.7288 ................
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