Science & Technology
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How to Gather Information on Target Audiences List
Information related to How to Gather Information on Target Audiences List
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Estimating Taxon-Environment Relationships: Central Tendencies
This page describes weighted average approach to estimating species optima in terms of central tendencies.
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Exploratory Data Analysis
Intro to exploratory data analysis. Overview of variable distributions, scatter plots, correlation analysis, GIS datasets. Use of conditional probability to examine stressor levels and impairment. Exploring correlations among multiple stressors.
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R Script: Classify Response Shape
Steps on how to perform a graphical classification of response shape.
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Using R to Estimate Central Tendencies
Script for computing a central tendency for a taxon.
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Selecting an Analysis Approach
An approach for selecting statistical analyses to inform causal analysis. Describes methods for determining whether test site conditions differ from reference expectations. Describes an approach for estimating stressor-response relationships.
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PECBO Appendix: Site Map
Site map for finding content in the PECBO Appendix, PECBO stands for "predicting environmental conditions from biological observations."
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Basic Principles & Issues
Interpreting p-values and confidence intervals
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R Script: Set Up Variables
Links to downloadable scripts and example data
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R Script: Calculate Weighted Average Inferences
Code to calculate the weighted average inference.
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R Script: Chi-Square Tests for Parametric and Non-parametric Models
How to Conduct Chi-Square Tests on Parametric and Non-Parametric Models.
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Using Taxon-Environment Relationships: Download Files and Set Up R
Step by step instructions for setting up your workspace to run statistical scripts.
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Download R Scripts and Sample Data
Includes links to downloadable scripts and example data to illustrate the analysis methods described in this module.
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Download Software
Overview of the data analysis tools available for download on CADDIS. Provides instructions for downloading and installing CADStat, access to Microsoft Excel macro for computing SSDs, a brief overview of command line use of R, a statistical software.
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R Script: Compute Cumulative Percentiles
Links to downloadable scripts and example data for how to compute cumulative percentiles.
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Exploratory Data Analysis
Additional approaches for understanding stressor correlations: variable clustering, PCA, Biplots, collinearity, space and time,
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Using R to Compute the Area Under the ROC Curve
Script for assessing model fit
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Using Data From Other Sources
This document includes a checklist for quality concerns when using data from other sources.
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PECBO Appendix
Overview of PECBO Module, using scripts to infer environmental conditions from biological observations, statistically estimating species-environment relationships, methods for inferring environmental conditions, statistical scripts in module.