Texas Instruments TI-84 - Manual (Page 311)

Chapter 12: Statistics 308
2-Var Stats 2-Var Stats 2-Var Stats 2-Var Stats
2-Var Stats (two-variable statistics) analyzes paired data. Xlistname is the independent
variable. Ylistname is the dependent variable. Each element in freqlist is the frequency of
occurrence for each data pair ( Xlistname,Ylistname ).
2-Var Stats [ Xlistname,Ylistname,freqlist ]
Med-Med (ax+b) Med-Med (ax+b) Med-Med (ax+b) Med-Med (ax+b)
Med-Med (median-median) fits the model equation y=ax+b to the data using the median-
median line (resistant line) technique, calculating the summary points x1, y1, x2, y2, x3,
and y3.
Med-Med displays values for a (slope) and b (y-intercept).
Med-Med [ Xlistname,Ylistname,freqlist,regequ ]
LinReg (ax+b) LinReg (ax+b) LinReg (ax+b) LinReg (ax+b)
LinReg(ax+b) (linear regression) fits the model equation y=ax+b to the data using a least-
squares fit. It displays values for a (slope) and b (y-intercept); when DiagnosticOn is set, it
also displays values for r
2
and r .