Sen's Slope Estimator

 

See Also:

Mann-Kendall Test for Trend

Trend Options

 

Description:

 

Sennon-parametric estimator of slope is a method of estimating the true slope (change in concentration over time) of the data. If the data show an upward slope, there is evidence of an upward trend. Because this method is non-parametric, it is suitable for a high percentage of non-detects and is not significantly affected by outliers.

 

 

Use:

 

To estimate the change in concentration over time to determine if there is an upward or downward trend in the data.

 

 

Remarks:

 

ChemStat supports this test for tied values, and multiple observations per time period. Analyzing data from multiple wells in a single analysis is not supported.