One Variance

Descriptive Statistics - Variance

  

This statistic measures the extent to which the data are scattered around their mean. It equals the square of the standard deviation.

Example Output

Method

 

The chi-square method is only for the normal distribution.

The Bonett method is for any continuous distribution.

 

 

Statistics

 

Variable   N  StDev  Variance

Length    50  0.871     0.759

 

 

95% Confidence Intervals

 

                                          CI for

Variable  Method       CI for StDev      Variance 

Length    Chi-Square  (0.728, 1.085)  (0.529, 1.178)

          Bonett      (0.704, 1.121)  (0.496, 1.257)

  

Interpretation

In the lumber yard example, the lengths of the beams in the sample have a variance of 0.759 cmimage\squared.gif.