Branch of Quality Systems


Most Current Cumulative Time Series Charts and Statistical Summaries
for NWQL LS 4434

The Time Series Charts
The charts provide OBSP recovery information for every analyte at different concentrations for every 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 most current time series charts in the table below will be overwritten periodically and will contain data that is currently being reviewed. All data is provisional and may change if the OBSP deems necessary.

There are two tables provided at the bottom of every time series chart that show statistical summaries.

Plotted Points Statistics Table
Description of the OBSP QA recoveries grouped by concentration level. The statistics in the table: mean, median, standard deviation and F-pseudosigma define bias and variability of the OBSP recoveries.

Sample Statistics Table
Counts (N) - The quantity of the variety of items.
Plotted - This number equals the total number in the above table.
Estimated Values - There are a number of reasons the laboratory will estimate (E) a result. If there are 100% of the results estimated the analyte is identified as a permanently estimated compound (analyte name in time series chart will be red).
Deleted Values - The laboratory may delete an entire sample or a single analyte for a number of reasons.
Spiked, Censored - A term for those samples that were spiked and correctly reported as less than a reporting level (possibly a raised reporting level) - the expected concentration was at a lower concentration than the censored result provided by the laboratory.
Spiked - The number of times the OBSP has submitted this analyte to the NWQL.
False Negative - The number of times the laboratory reports this analyte as not present in the sample when it is there.
Not Spiked - The number of times the OBSP has submitted a sample to the appropriate schedule, without this analyte.
False Positive - The number of times the laboratory reports this analyte as present when it is not in the sample.

The charts and data that you might secure from this U.S. Geological Survey (USGS) web page (identified as "OBSP") have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use.

Lab Schedule 4434 - Custom Hormones in unflitered water
Choose an analyte below or click here for all analytes sorted by NWQL parameter code Parameter CAS#
11-Ketotestosterone 64527GM005 564-35-2
17-alpha-Estradiol 64528GM005 57-91-0
17-alpha-Ethynylestradiol 64529GM005 57-63-6
17-beta-Estradiol 64530GM005 50-28-2
3-beta-Coprostanol 64532GM005 360-68-9
4-Androstene-3,17-dione 64533GM005 63-05-8
Androsterone 64535GM005 53-41-8
Cholesterol 64534GM005 57-88-5
Dihydrotestosterone 64544GM005 521-18-6
Epitestosterone 64537GM005 481-30-1
Equilenin 64538GM005 517-09-9
Equilin 64539GM005 474-86-2
Estriol 64540GM005 50-27-1
Estrone 64541GM005 53-16-7
Mestranol 64542GM005 72-33-3
Norethindrone 64531GM005 68-22-4
Progesterone 64543GM005 57-83-0
Testosterone 64545GM005 58-22-0
trans-Diethylstilbestrol 64536GM005 56-53-1

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Page Last Modified: March 26, 2018