Hypothesis Testing with t-Test: Comparing Two Means

When you have two groups and see a difference in the means between them, is that big enough for us to take actions or spend more time to investigate about the difference? Or, maybe the difference is so marginal that we'd better move on?

One of the hypothesis methods called t-test helps us to answer these questions.

In this seminar, Kan will introduce what t-test is and how you can use it to test the difference between two groups.

This is a part of the Hypothesis Testing series. If you haven't yet we'd strongly recommend you watch the following Hypothesis Testing intro video first.

• Introduction to Hypothesis Testing (https://youtu.be/OT08uuim5t0)

Agenda:

• Thinking Framework Hypothesis Testing
• Is the Difference between Two Means Significant?
• Central Limit Theorem
• Standard Error
• t Value
• t Test
• P Value and Significant Level
• Confidence Interval of Difference

Hypothesis Testign Series

• Part 1 - Introduction to Hypothesis Testing
• Part 2 - t-Test: Comparing Two Means (This one)
• Part 3 - Kruskal Wallis Test: Comparing Several Means with No Assumption
• Part 4 - Chi-Square Test: Are These Two Categorical Variables Related?

Past Seminars

You can check other past seminars on this page.

For the upcoming seminars, check out our Exploratory Online Seminar page!