Statistical Variables - Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book

system displays the revised parameter value in the symbolic expression Y=mX+B, and refreshes
the graph with the updated Manual-Fit Line.
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 screen. You can then enter a different
Home
This takes you to the Graph screen and then pastes the Manual-Fit equation in the specified
In this example, .
Y4

Statistical Variables

The statistical variables are calculated and stored as indicated below. To access these variables
for use in expressions, press , and select
the column below under
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
population standard deviation of y
sum of x ... y
minimum of x values
maximum of x values
minimum of y values
maximum of y values
1st quartile
median
3rd quartile
regression/fit coefficients
polynomial, Logistic, and SinReg
coefficients
menu. If you edit a list or change the type of analysis, all statistical
VARS
1-Var
Stats
v
G x
2
x
G
Sx
s x
n
minX
maxX
Q1
Med
Q3
such as
Y-Var
. Then select the
5:Statistics
2-Var
Stats Other
v
G x
2
x
G
Sx
s x
n
w
G y
2
G y
Sy
s y
G xy
minX
maxX
minY
maxY
a, b
a, b, c,
d, e
Chapter 12: Statistics
and then press Í.
Y4
Y-Var
menu shown in
VARS
VARS
menu
XY
G
G
XY
XY
XY
XY
G
G
XY
XY
G
XY
XY
XY
XY
PTS
PTS
PTS
EQ
EQ
.
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