Interactive Demo
Welch's T-Test Visualizer
Welch's T-Test Visualizer is a free, interactive learning demo from the Introductory Statistics course on Lykke. It helps you build intuition for Independent Samples, Matched Pairs, Difference of Means, Pooled Variance. Play with it directly in your browser — it features 7 sliders and a live visual canvas. This demo lives in the “Hypothesis Testing with Two Samples” section of the course.
How to use this demo
- Drag the “Group A Mean (μ₁) 50”, “Group A Std Dev (s₁) 5”, “Group A Size (n₁) 30” sliders to change the inputs and watch the result update live.
- Experiment freely — there's nothing to break, and every change is reversible.
What you'll explore
- Independent Samples
- Matched Pairs
- Difference of Means
- Pooled Variance
Frequently asked questions
What does the Welch's T-Test Visualizer demo do?
of Difference Adjust sliders to see how variance and sample size affect significance. Welch's T-Test Visualizer lets you explore this hands-on instead of only reading about it.
What Introductory Statistics concept does Welch's T-Test Visualizer teach?
Comparing two different populations to see if there is a significant difference between them. It focuses on Independent Samples, Matched Pairs, Difference of Means, Pooled Variance from the “Hypothesis Testing with Two Samples” section.
What can I control in Welch's T-Test Visualizer?
The “Group A Mean (μ₁) 50”, “Group A Std Dev (s₁) 5”, “Group A Size (n₁) 30” sliders change the key inputs. Every change updates the visualization in real time, so you can see exactly how each variable affects the outcome.
How does Welch's T-Test Visualizer fit into the Introductory Statistics course?
Introductory Statistics 2e is a comprehensive, open-source course designed for a one-semester introduction to statistics. The curriculum focuses on practical applications across diverse fields such as business, healthca… This demo is the interactive piece for the “Hypothesis Testing with Two Samples” section. Open the full Introductory Statistics course wiki at https://www.getlykke.com/explore/public/introductory-statistics-a4146afb-5db4-4b78-bb6a-8cef9d5ce9e0 for notes, flashcards, quizzes and the other demos.
What will I understand better after using Welch's T-Test Visualizer?
You'll build intuition for Independent Samples, Matched Pairs, Difference of Means, Pooled Variance — and, crucially, see how they behave when you change the inputs, which is hard to get from a textbook or lecture on Introductory Statistics alone.
From the Introductory Statistics course
This interactive demo is part of the Hypothesis Testing with Two Samples section. Explore the full Introductory Statistics course wiki on Lykke — with notes, flashcards, quizzes and more interactive demos.
Open the Introductory Statistics course →