Texas Instruments TI-30XS User Manual - Page 31

If Sydney, Australia is 21ÄC, find the temperature in degrees Fahrenheit. !$$$21 < Statistics % t v % t displays a menu with the following options: • 1-Var Stats analyzes statistical data from 1 data set with 1 measured variable, x. • 2-Var Stats analyzes paired data from 2 data sets with 2 measured variables-x, the independent variable, and y, the dependent variable. • StatVars displays a secondary menu of statistical variables. The StatVars menu only appears after you have calculated 1-Var or 2-Var stats. Use $ and # to locate the desired variable, and press < to select it. Variables Definition n Ï or Ð Number of x or (x,y) data points. Mean of all x or y values. Sx or Sy Îx or Îy Òx or Òy Sample standard deviation of x or y. Population standard deviation of x or y. Sum of all x or y values. Òx2 or Òy2 Sum of all x2 or y2 values. Òxy Sum of (x ...y) for all xy pairs. a Linear regression slope. b Linear regression y-intercept. r Correlation coefficient. xÅ (2-Var) Uses a and b to calculate predicted x value when you input a y value. Copyright © 2006 Texas Instruments Incorporated 31