Statistics Lectures - 22: More Samples t-Test


A series of free Statistics Lectures with lessons, examples & solutions in videos.

This is page twenty-two of the series of free video lessons, “Statistics Lectures”. These lectures continues the discussion on samples t-test from the previous lectures, covering confidence intervals for dependent samples t-test, effect size for dependent samples t-test, z-test for proportions.




Share this page to Google Classroom

Related Pages
20: One Sample z-Test & One Sample t-Test
21: Various Types Of Samples t-Test
23: ANOVA
24: Repeated Measures ANOVA & Factorial ANOVA
Jump to Table of Contents

Statistics - Lecture 66: Confidence Intervals For Dependent Samples t-Test

We use the Dependent Samples t-Test to test if two sample menas are different from one another.
After the t-Test, confidence intervals can then be constructed to estimate how large that mean difference is.




Statistics - Lecture 67: Effect Size For Dependent Samples t-Test

The effect size allows us to measure the magnitude of mean differences. This is usually calculated after rejecting the null hypothesis in a statistical test. If the null hypothesis is not rejected, effect size has little meaning.

Statistics - Lecture 68: z-Test For Proportions, Two Samples

Researchers want to test the effectiveness of a new anti-anxiety medication. In clinical testing, 64 out of 200 people taking the medication report symptoms of anxiety. Of the people receiving a placebo, 92 out of 200 report symptoms of anxiety. Is the medication working any differently than the placebo?
Test this clain using alpha = 0.05

  1. Define Null and Alternative Hypotheses
  2. State Alpha
  3. State Decision Rule
  4. Calculate Test Statistic
  5. State Results
  6. State Conclusion


Statistics - Lecture 69: Confidence Intervals For The Difference Of Two Proportions

We use the z-Test for Proportions to test if two proportions are different from one another.

Statistics Lecture Series - Table Of Contents

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
Mathway Calculator Widget



We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.