EnvironmentalStats for S-PLUS

Frequently Asked Questions

• What can I do with it?
• Who uses it?
• Would you recommend it to general S-PLUS users?
• What are the system requirements?
• What do I need to know?
• How much does it cost?
• How do I get more information on EnvironmentalStats for S-PLUS?
• How do I get more information on S-PLUS?

What can I do with EnvironmentalStats for S-PLUS?

• Plot probability distributions so you can see how they change with the value of the distribution parameter(s).
• Estimates distribution parameters and compute confidence intervals for commonly used probability distributions.
• Plot the results of a Goodness-of-Fit test.
• Compute parametric and non-parametric prediction and tolerance intervals.
• Perform nonparametric estimation and tests for seasonal trend.
• Create power and sample size plots.
• Handle singly and multiply censored (less-than-detection-limit) data.
• Perform probabilistic risk assessment.
• Reproduce specific examples in EPA guidance documents by using built-in data sets from these documents.
• Look up statistical methods in the environmental literature in a hypertext help system that functions like an electronic text book.  The help system:

Explains the equations.

Links the equations to references.

Includes abstracts of selected references.

Contains a glossary of statistical and environmental terms.

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Who uses EnvironmentalStats for S-PLUS?

Anyone who has to make sense of environmental data, including hydrologists, soil scientists, atmospheric scientists, statisticians, geochemists, environmental engineers and consultants, hazardous and solid waste site managers, and regulatory agency analysts and enforcement officers.  (Click here to see a list of current users.)  Parts of EnvironmentalStats for S-PLUS incorporate statistical methods that have appeared in the environmental literature but are not commonly found in any statistical software package.  Parts of EnvironmentalStats for S-PLUS are specifically aimed at users who are required to collect and analyze environmental monitoring data in order to comply with federal and state Superfund, RCRA, CERCLA, and Subtitle D regulations.  All of the functions in EnvironmentalStats for S-PLUS, however, are useful to anyone who needs to analyze environmental data.

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Would you recommend EnvironmentalStats for S-PLUS to general S-PLUS users?

Emphatically YES!  Many people involved in statistical analysis often need to estimate distribution parameters, compute confidence intervals, and perform power and sample size calculations.  Furthermore, the hypertext help system is an extremely useful tool for anyone who uses S-PLUS to teach statistics or educate clients.  Click here to see a selection of customer testimonials.

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What are the system requirements for EnvironmentalStats for S-PLUS?

Because EnvironmentalStats for S-PLUS is an S-PLUS module, it can run under every operating system that S-PLUS runs under.  Currently, however, there is only a Windows version of EnvironmentalStats for S-PLUS.  The module requires approximately 50 MB of disk space.

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What do I need to know in order to use EnvironmentalStats for S-PLUS?

EnvironmentalStats for S-PLUS is an S-PLUS module.  In order to use it, you need to know how to perform basic operations in S-PLUS, such as reading data into S-PLUS, and creating basic data objects like vectors, matrices, and data frames.

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How much does EnvironmentalStats for S-PLUS cost?

Contact Insightful Corporation for pricing and ordering information.

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How do I get more information on EnvironmentalStats for S-PLUS?

Visit the EnvironmentalStats for S-PLUS page on the Insightful web site, or contact Insightful Corporation.

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How do I get more information on S-PLUS?

Visit the Insightful Corporation web site, or contact Insightful Corporation.

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Send mail to SMillard@ProbStatInfo.com with questions or comments about this web site.
Copyright © 1997 Probability, Statistics & Information
Last modified: December 28, 2001