Linear Regression: Finding Intercept, Slope, and Correlation with MathCAD - Prof. Nam Sun , Study notes of Chemistry

Download Linear Regression: Finding Intercept, Slope, and Correlation with MathCAD - Prof. Nam Sun and more Study notes Chemistry in PDF only on Docsity! 1 regressb.mcd Straight-Line LINEAR REGRESSION -- fit data into the following linear form: y(x) = a0 + a1*x Instructor: Nam Sun Wang ---------------------------------------------------------------------------------------------------------------------------------------------- Assign data within a MathCAD worksheet to vectors x and y interactively. i ..0 1000 ... give a large number so that we do not have to count; redimension later. xi 1 2 3 4 5 yi 11 19 34 50 73 i ..0 last( )x ... total number of observations = =last( )x 4 Find the intercept, slope, and R2 correlation coefficient a0 intercept( ),x y =a0 9.1 a1 slope( ),x y =a1 15.5 =corr( ),x y 2 0.971 Regression Line: R( )x a0 .a1 x Plot xx ..,0 0.1 5 yi R( )xx ,xi xx