Texas Instruments Titanium TI-89, Руководство пользователя

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Statistics and Data Plots 534
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
Statistical variables are stored as system variables. However,
regCoef
and
regeq
are
treated as a list and a function variable, respectively.
One
Var Two
Var Regressions
mean of x values
ü ü
sum of x values
G
x
G
x
sum of x
2
values
G
x
2
G
x
2
sample std. deviation of x Sx Sx
population std. deviation of x †
s x s x
number of data points nStat nStat
mean of y values
ÿ
sum of y values
G
y
sum of y
2
values
G
y
2
sample standard deviation of y Sy
population std. deviation of y †
s y
sum of x † y values G xy
minimum of x values minX minX