ΟΙ ΣΥΝΕΡΓΑΤΕΣ ΠΟΥ

ΣΥΜΒΑΛΛΟΥΝ ΕΝΕΡΓΑ ΣΤΗΝ ΕΠΙΤΥΧΙΑ

ChemStat


ChemStat is the easiest and fastest application available for the statistical analysis of ground water monitoring data at RCRA facilities. ChemStat includes most statistical analysis methods described in the 1989 and 1992 USEPA statistical analysis documents, USEPA Draft Unified Guidance Document, U.S. Navy Statistical Analysis Guidance document, and other guidance documents and methods documented in popular statistical texts. 

 A unique combination of ease-of-use and innovative technologies make ChemStat the value leader for environmental statistical analysis. 




ChemStat Analysis Methods
  • Graphs
    • Box/Whisker Plots
    • Single Well Concentration vs. Time Plot
    • Multiple Well Concentration vs. Time Plot
    • Multiple Parameter Concentration vs. Time Plot
    • Probability Plots
    • Shewhart-CUSUM Control Chart for both Intra-Well or Inter-Well Comparison
    • Exponentially Weighted Moving Average Control Chart for both Intra-Well or Inter-Well Comparison
  • Parametric Methods
    • Parametric ANOVA with Individual Well Comparisons
    • Parametric Prediction Limit (intra-well or inter-well comparison)
    • Parametric Tolerance Limit (comparison to background)
    • Parametric Tolerance Limit (comparison to MCL)
    • Parametric Confidence Interval
    • Parametric t-test
    • Satterthwaite t-test
    • Welch's t-test
  • Non-Parametric Methods
    • Kruskal-Wallis Non-Parametric Analysis
    • Wilcoxon Rank-Sum Non-Parametric Analysis (intra-well comparison)
    • Wilcoxon Rank-Sum Non-Parametric Analysis (inter-well comparison)
    • Poisson Prediction Limit
    • Poisson Tolerance Limit (comparison to background)
    • Poisson Tolerance Limit (comparison to MCL)
    • Non-Parametric Prediction Limit (intra-well or inter-well comparison)
    • Non-Parametric Confidence Limit
    • Gehan's Test
    • Slippage Test
    • Quantile Test
    • Two Sample Test of Proportions MCL Comparison
  • Distribution/Outlier/Trend Testing
    • Levene's Test for Homogeneity of Variance
    • Bartlett's Test for Homogeneity of Variance
    • Shapiro-Wilks Test of Normality
    • Shapiro-Francia Test of Normality
    • Coefficient of Variation Test of Normality
    • D'Agostino's Test of Normality
    • Skewness Coefficient Test
    • Dixon's Test for Outliers
    • Rosner's Test for Outliers
    • Discordance Outlier Test
    • Mann-Kendall Test for Trend
    • Spearman's Test for Trend
    • Sen's Slope Analysis for Trend
    • Seasonal Kendall Analysis
    • Kurtosis

Features

ChemStat is powerful
  • Data set size limited only by computer memory for most tests
  • Unlimited number of parameters
  • Unlimited number of wells
  • Unlimited number of sample dates
  • Unlimited parameter name and well label length
  • Easily exclude individual data points from analyses

  • Fast Performance
  • Full report and graph printing and print preview
  • Export reports to tab-delimited ASCII text file
  • Export reports to a word processor in rich-text format
  • Numerous choices for page headers and footers, page left, right, and center
  • Choice of multiple fonts and colors in graphs and reports
  • Highly customizable user-interface

  • ChemStat is easy to learn
    • Easily select parameter for analysis from drop-down list
    • Complete on-line help with "what's this" context sensitive help
    • Advisor Window displays information about the method and suitability of the method to the data set
    • Method selector tree allows easy selection of the appropriate statistical test for your data
  • Data Set Transformations
    • Quickly convert from original data to log-transformed and back
    • Easily represent non-detects with 0, 1, DL/2 or DL for any test
    • Accommodate censored data with Cohen's or Aitchison's adjustments