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Chapter 10: 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 =
Σx
2
– nx
2
n – 1
σxPopulation standard deviation of sample (x)
σx =
Σx
2
– nx
2
n
Σx Sum of sample (x)
Σx
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)
σyPopulation standard deviation of sample (y)
Σy Sum of sample (y)
Σy
2
Sum of squares of sample (y)
Σxy Sum of product of sample (x, y)
ymin Smallest value of sample (y)
ymax Largest value of sample (y)