User Manual

A-4 TI-30XS MultiView: A Guide For Teachers © 2006 TEXAS INSTRUMENTS INCORPORATED
A
Quick reference to keys (Continued)
% t Displays the following menu from which you can select 1-Var, 2-Var, or
StatVars.
1-Var Analyzes data from 1 set of data with 1 measured
variable–x.
2-Var Analyzes paired data from 2 sets of data with 2
measured variables–x, the independent variable, and y,
the dependent variable.
StatVars After choosing 1-var or 2-var stats, displays data
values.
StatVars displays the following menu of stat variables with their current
values.
n Number of x (or x,y) data points.
v or w Mean of all x or y values.
Sx or Sy Sample standard deviation of x or y.
sx or sy Population standard deviation of x or y.
Gx or Gy Sum of all x values or y values.
Gx
2
or Gy
2
Sum of all x
2
values or y
2
values.
Gxy Sum of the product of x and y for all xy pairs in 2 lists.
a Linear regression slope.
b Linear regression y-intercept.
r Correlation coefficient.
xÅ
ÅÅ
Å (2-Var) Uses a and b to calculate predicted x value when you
input a y value.
yÅ
ÅÅ
Å (2-Var) Uses a and b to calculate predicted y value when you
input an x value.
minX Minimum of x values.
Q1 (1-Var) Median of the elements between minX and Med (1st
quartile).
Med Median of all data points.
Q3 (1-Var) Median of the elements between Med and maxX (3rd
quartile).
maxX Maximum of x values.
KEY FUNCTION