Statistical Variables - Texas Instruments TI-84 Plus Manual Book

Select y 5 to finish the Manual Fit function. The calculator stores the current mX+b
expression into Y1 and makes that function active for graphing. You can also select
Manual-Fit while on the
and then press Í. This takes you to the Graph screen and then pastes the Manual-
Fit equation in the specified

Statistical Variables

Statistical Variables
Statistical Variables Statistical Variables
The statistical variables are calculated and stored as indicated below. To access these
variables for use in expressions, press , and select
menu shown in the column below under
VARS
the type of analysis, all statistical variables are cleared.
Variables
mean of x values
sum of x values
2
sum of x values
sample standard deviation of x
population standard deviation of x
number of data points
mean of y values
sum of y values
2
sum of y values
sample standard deviation of y
Chapter 12: Statistics
screen. You can then enter a different
Home
. In this example,
Y-Var
.
Y4
5:Statistics
menu. If you edit a list or change
VARS
1-Var 2-Var
Stats Stats
v v
G G
x x
2 2
G G
x x
Sx Sx
s s
x x
n n
w
G
y
2
G
y
Sy
such as
Y-Var
. Then select the
VARS
Other menu
XY
G
G
XY
XY
XY
XY
G
G
XY
Y4
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