StatKey
StatKey: Free browser applets for practicing inference, sampling distributions, and data analysis. Ranked #17 of 40 in Statistics Learning Software by our editors (7.9/10); pricing: Free plan; best for practicing inference and sampling distributions.
At a glance
- Editor score7.9 / 10
- PricingFree plan
- Best forPracticing inference and sampling distributions
- Free planYes
- Paid fromNone
- Facts checked28 Sep 2026
Where it wins
- Free interactive simulations for sampling distributions and inference
- Analyze built-in datasets or upload custom CSV and text data
- Keyboard navigation and screen-reader support
Where it doesn't
- Focused on introductory statistics rather than a broad course curriculum
- Online applets depend on a current web browser
- Designed as a companion to Lock5's Statistics: Unlocking the Power of Data
Our verdict on StatKey
StatKey is a collection of browser-based statistical applets from Lock5, intended for introductory statistics students and instructors. It is particularly suited to learners who want to explore inference and sampling distributions interactively, rather than follow a packaged sequence of lessons. The tools cover descriptive statistics and graphs for quantitative and categorical data, along with simulations and procedures for examining statistical ideas.
Its strongest fit is practicing inference. Learners can build bootstrap confidence intervals for means, medians, standard deviations, and proportions, and explore randomization-based hypothesis tests. Sampling-distribution simulations cover means and proportions; interactive theoretical distributions include normal, t, chi-square, and F. Chi-square and ANOVA randomization procedures extend the range of questions the applets can illustrate. This gives instructors and students several ways to investigate statistical concepts, though the product is described as a set of tools, not a full lesson or classroom-management system.
StatKey runs in current web browsers and supports built-in datasets as well as uploads of custom CSV or text data, with upload help documented. Keyboard navigation and screen-reader support are also listed. The product is free, so learners can access its applets without choosing among paid tiers. Email and documentation are the listed support channels. Because StatKey is presented as an online companion to Statistics: Unlocking the Power of Data, it is a natural fit for learners using that textbook or seeking focused practice with simulations and inference. Those looking for a broader course platform with a structured lesson sequence or classroom tools should consider a different type of product.
StatKey pricing
StatKey fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| Guided lessons | Not verified |
| Statistics simulations | Yes |
| Probability experiments | Not verified |
| Classroom tools | Not verified |
| Supported platforms | web |
| Deployment | Cloud |
| Platforms | Web |
| Support | Email, Docs |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Pricing | Free plan |
| Website | lock5stat.com |
| Facts checked | 28 Sep 2026 |
Alternatives to StatKey
- Integrated Statistics Learning Environment (ISLE)An open-source teaching environment that pairs statistics instruction with collaborative analysis.9.3
- SOCR (Statistics Online Computational Resource)A broad, free statistics resource combining learning materials, simulations, and analysis tools.9.2
- Conceptual Learning with Interactive AppletsA free, browser-based collection for visualizing core statistics concepts in class.9.1
See all StatKey alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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