Descriptive Statistics
statisticsSummary statistics with 95% UCL and full non-detect handling.
Data
One result per line. Columns can be separated by spaces, commas, semicolons or tabs, so you can paste straight from Excel.
| Column | What it is | Example |
|---|---|---|
| 1. Result | The measured value | 596.6 |
A line looks like 596.6
For a result below the laboratory limit of reporting, enter it as <LOR, e.g. <0.5.
Drop a CSV or Excel file here, or
Read in your browser and put in the box below. The file itself is not uploaded.
10 value(s) parsed
Run
Paste your data and run the analysis
Summary statistics and the UCL candidate table will appear here.
What this calculates
Summary statistics for a concentration dataset - sample size, mean, standard deviation, median, IQR, coefficient of variation and skewness - plus the 95% upper confidence limit of the mean (95% UCL) across Student's t, Modified t, CLT, Chebyshev and Land's H-statistic (lognormal), with an Anderson-Darling goodness-of-fit check and an automatic recommendation. Non-detects are substituted at their detection limit.
Method references
US EPA statistical guidance for environmental data, Helsel (2012) Statistics for Censored Environmental Data, and ITRC guidance on groundwater statistics.