manual

© 2007 TEXAS INSTRUMENTS INCORPORATED TI-34 III Explorer Plus: A Guide For Teachers A-5
A
Quick reference to keys (continued)
%t Displays the following menu from which you can select 1-Var, 2-Var, or
StatVars.
1-Var Stats Analyzes data from 1 set of data with 1 measured
variable–x.
2-Var Stats 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.
Ï or Ð Mean of all x or y values.
Sx or Sy Sample standard deviation of x or y.
Îx or Îy Population standard deviation of x or y.
Òx or Òy Sum of all x values or y values.
Òx
2
or Òy
2
Sum of all x
2
values or y
2
values.
Òxy 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.
x ' (2-Var) Uses a and b to calculate predicted x value when you
input a y value.
y
' (2-Var) Uses a and b to calculate predicted y value when you
input an x value.
L Lets you store values to variables. Press Lto store a variable, and
press z to select the variable to store.
z displays the following menu of variables: x y z t a b c.
Press < to store the value in the selected variable. If this variable
already has a value, that value is replaced by the new one.
< Completes the operation or executes the command.
KEY FUNCTION