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The Multiple Schedule tools are a package of three charts for every analyte that OBSP tests that occurs in more than one NWQL Schedule. Provided in this package is a Box Plot chart,
Time Series chart, and a Recovery vs. Concentration chart for each analyte.
All data is provisional and may change if the OBSP deems necessary.
The boxplot charts show the distribution bias and variability of the blind organic QA recovery data. The plot also shows outliers and quartile ranges of the recovery data.
Extreme values have been "clipped" or removed from the plot and designated as such with a blue dot.
The Time Series Charts
The charts provide OBSP recovery information for every analyte at different concentrations for every NWQL Schedule OBSP assesses. The charts exhibit a Locally Weighted Scatterplot Smoothing (LOWESS) line.
This line is used to help observe patterns and trends of the data over time. The time series charts also show bias and variability of the OSBP data.
The recovery versus concentration charts provide OBSP recovery information for every analyte at different concentrations for every NWQL Schedule OBSP assesses. The black line on the chart describes the median recovery of the data.
Note: If an analyte of interest is not seen in the method listing, there is no OBSP data available for that analyte |
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U.S. Department of the Interior |
U.S. Geological Survey
URL: https://bqs.usgs.gov/index.php
Project Contact Information: dbeaty@usgs.gov
Page Contact Information: Webmaster
Page Last Modified:
March 22, 2018
