OpenVSP creates 3D aircraft models from common engineering parameters for processing into formats used in engineering analysis.
Open source
24 alternativesStat Trek
Stat Trek offers free tutorials and tools for statistics, probability, and survey analysis.
About Stat Trek
Stat Trek offers tutorials and online calculators for statistics, probability, and survey analysis. Tutorials cover AP Statistics, probability, linear regression, analysis of variance, survey sampling, and matrix algebra, with written and video lessons, practice and review questions, and sample AP practice exams with detailed solutions.
Its tools include calculators for discrete and continuous probability distributions, sample size planning, and random number lists up to 10,000 numbers with control over range and duplicates. The site states that AP and Advanced Placement Program are trademarks of the College Board, which was not involved in and does not endorse the website.
Key features
- Tutorials on AP Statistics, probability, regression, ANOVA, sampling, matrix algebra
- Practice exams with detailed solutions for AP Statistics preparation
- Random number generator up to 10,000 numbers with range and duplicate options
- Sample size calculator to compare sampling methods and assess power
- Calculators for binomial, Poisson, normal, chi-square, t and other distributions
- Special-purpose calculators for Bayes rule, combinations, permutations and factorials
Best for: Students studying statistics on their own, including those preparing for the AP Statistics exam.
Good for
- Tutorials described as free with practice questions and solved problems
- Coverage includes AP Statistics curriculum, regression, ANOVA, sampling and matrix algebra
- Calculators provide instructions and worked examples illustrating use
Watch out for
- Random number lists limited to 10,000 numbers
Stat Trek at a glance
- Website
- stattrek.com
- Category
- Education & Learning › Mathematics Learning
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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