- Statistical Principles & Probabilistic Data Models
- Sample Design
- Estimating Means, Medians & Variances& Other Parameters
- Dealing with Non-detects
- Fitting Data to Distributions
- Functions of Random Variables
- Statistical Intervals
- Confidence Intervals
- Tolerance Intervals
- Prediction Intervals
- Parametric Methods
- Non-Parametric Methods
- Hypothesis testing
- Parametric
- Non-Parametric
- Bootstrapping & Randomization
- Analysis of variance
- Linear regression
- Logistic regression
- Contingency tables
- Statistical graphics
- Multivariate methods
Planned Maintenance — August 8-9, 2026
We will be performing scheduled website maintenance this weekend. During this time, the site may be temporarily unavailable.
We appreciate your patience. If you need to register for a course or have questions, please contact us at info@nwetc.org or 425-270-3274.







