Software Output Raw
data from previous example
Descriptive
Statistics
Variable:
Age 











Count 
7 

Pop Var 
215.6327 
B 
Sum 
310 

Sam Var 
251.5714 

Mean 
44.2857 

Pop Std 
14.6844 

Median 
42 

Sam Std 
15.861 

Min 
24 

Std Error 
5.9949 

Max 
65 

CV% 
35.8152 
C 
Range 
41 

95% CI (+/) 
14.669 
D 
Skewness 
0.0871 
A 
One sample ttest (P<) 
0.0003 
E 
A
Skewness provides an indication of the how
asymmetric the distribution is for a given sample. A
negative value indicates a negative skew. Values
greater than 1 or less than 1 indicate a nonnormal distribution.
B Population variance and standard deviation
(Std) will always be less than sample variance and standard deviation, since you are
dividing the sum of squares by n instead of n1.
C Coefficient of Variation (CV) is the ratio of
the sample standard deviation to the sample mean: (sample standard deviation/sample
mean)*100 to calcuate CV%. It is used as a
measure of relative variability, CV is not affected by the units of a variable.
D Add and subtract this
value to the mean to create a 95% confidence interval.
E This represents the results of a onesample
ttest that compares the sample mean to a hypothesized population value of 0 years of age.
In this example, the sample mean age of 44 is statistically significantly different from
zero.
