Basic Statistics

 

Description:

 

The Basic Statistics report shows a variety of statistical calculations for the data. Statistics for are displayed for all locations for the selected parameter. These statistical values can be used to simplify statistical calculations beyond the capabilities of ChemStat, or for verification of ChemStatcalculations.

 

 

Parameter Specific Values:

 

Total Measurements -- The total number of measurements for the specified parameter.

 

Total Non-Detects -- The total number of non-detects for the specified parameter.

 

Pooled Mean -- The arithmetic mean of all measurements for the specified parameter.

 

Pooled Std Dev -- The standard deviation of all measurements for the specified parameter.

 

Background Mean -- The arithmetic mean of all background measurements for the specified parameter.

 

Background Std Dev -- The standard deviation of all background measurements for the specified parameter.

 

 

Well Specific Values:

 

Samples -- The total number of samples for the specified parameter from the specified well.

 

Non-Detects -- The total number of non-detects for the specified parameter from the specified well.

 

% ND -- The percentage of non-detects for the specified parameter from the specified well.

 

Total -- The sum of all measurements for the specified parameter from the specified well.

 

Mean -- The arithmetic mean of all measurements for the specified parameter from the specified well.

 

Std Dev -- The standard deviation for the specified parameter from the specified well.

 

Dif From Bkg -- The difference of the well mean and the background mean.

 

Std Err -- The standard error of the measurements for the specified parameter from the specified well. Standard error is used for individual well comparisons in the parametric ANOVA method.

 

Rank Sum -- The sum of the ranks for the specified parameter from the specified well. This value is used for the Kruskal-Wallis non-parametric analysis.

 

Rank Mean -- The arithmetic mean of the ranks for the specified parameter from the specified well. This value is used for the Kruskal-Wallis non-parametric analysis.