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
üü
sum of x values
Gx Gx
sum of x
2
values Gx
2
Gx
2
sample std. deviation of x Sx Sx
population std. deviation of x †
sx sx
number of data points nStat nStat
mean of y values
ÿ
sum of y values
Gy
sum of y
2
values Gy
2
sample standard deviation of y Sy
population std. deviation of y †
sy
sum of x†y values Gxy
minimum of x values minX minX
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