Calculated Variables - Texas Instruments TITANIUM TI-89 User Manual

Management. All statistical variables are cleared when you edit the data or change the
calculation type. Other conditions that clear the variables are listed.

Calculated Variables

Calculated Variables
Calculated Variables Calculated Variables
Statistical variables are stored as system variables. However,
treated as a list and a function variable, respectively.
mean of x values
sum of x values
2
sum of x values
sample std. deviation of x
population std. 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 std. deviation of y
sum of x † y values
minimum of x values
Statistics and Data Plots
One Two
Var Var
ü ü
G x G x
2 2
x x
G G
Sx Sx
x x
s s
nStat nStat
ÿ
G y
2
y
G
Sy
y
s
G xy
minX minX
and
regCoef
Regressions
are
regeq
549