Texas Instruments TI-80 User Manual - Page 141
Types of Statistical Analysis, The first list you reference is the independent variable X list.
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Types of Statistical Analysis These calculations return statistical results based on the list(s) you reference. If you reference a third list name as an argument for 2-VAR STATS or any of the regression models, the list is interpreted as the frequencies of occurrence for the data pairs in the first two lists. 1-VAR STATS 1-VAR STATS (one-variable statistics, STAT CALC, item 1) analyzes data with one measured variable and calculates statistical results as indicated on page 9-17. If you reference two list names, the second list is interpreted as the frequency of occurrence for each data point in the first list. 1-VAR STATS listname 1-VAR STATS Xlistname,freqlistname 2-VAR STATS LINREG (aX+b) 2-VAR STATS (two-variable statistics, STAT CALC, item 2) analyzes paired data between which there is a relationship. This option calculates statistical results as indicated on page 9-17. The first list you reference is the independent variable (X list). The second list is the dependent variable (Y list). If you reference a third list name, it is interpreted as the frequency of occurrence for each data pair in the first two lists. 2-VAR STATS Xlistname,Ylistname 2-VAR STATS Xlistname,Ylistname,freqlistname LINREG (aX+b) (linear regression, STAT CALC, item 3) fits the data to the model y=ax+b using a least-squares fit and x and y. It displays a (slope), b (y-intercept), and r (correlation coefficient). LINREG (aX+b) Xlistname,Ylistname LINREG (aX+b) Xlistname,Ylistname,freqlistname Statistics 9-15