125
Chapter 8: Statistics & Regression Calculations
2. Statistical evaluations available under the C CALC menu
1_Stats
1-variable (x) statistical a calculations
x
_
Mean of sample (x)
sx
Standard deviation of sample (x)
sx =
Σ
x
2
–
nx
2
n
–
1
σ
x
Population standard deviation of sample (x)
σ
x =
Σ
x
2
–
nx
2
n
Σ
x
Sum of sample (x)
Σ
x
2
Sum of squares of sample (x)
n
Sample number
xmin
Smallest value of sample (x)
Q1
First quartile of sample (x)
Med
Median of sample (x)
Q3
Third quartile of sample (x)
xmax
Largest value of sample (x)
2_Stats
2-variable (x, y) statistical calculations
The following values are added to the 1-variable statistic calcula-
tions
y
_
Mean of sample (y)
sy
Standard deviation of sample (y)
σ
y
Population standard deviation of sample (y)
Σ
y
Sum of sample (y)
Σ
y
2
Sum of squares of sample (y)
Σ
xy
Sum of product of sample (x, y)
ymin
Smallest value of sample (y)
ymax
Largest value of sample (y)
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