Statistical & Hypothesis Tests: Performing Two-sample T-tests & Paired T-tests

Statistics    |    Expert
  • 14 videos | 2h 5m 38s
  • Includes Assessment
  • Earns a Badge
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In situations where two independent samples are drawn from different populations or where paired samples are available, such as in a before-after scenario, two-sample and paired T-tests are needed, respectively. Use this course to explore how two-sample T-tests can be used to test the null hypothesis that two independent samples have drawn from populations with equal means. You'll examine type I and type II errors and the use of paired samples T-tests. By the time you finish this course, you will be able to test whether two samples - either drawn independently or explicitly linked - are drawn from populations with equal means.

WHAT YOU WILL LEARN

  • Discover the key concepts covered in this course
    Recall the assumptions of the two-sample t-test
    Use levene’s test to check for equal variances
    Use the two-sample t-test to compare means
    Recognize when the welch’s t-test should be used
    Use the welch’s t-test to compare means
    Describe type i and type ii errors
  • Outline the relationship between type i errors and alpha levels
    Outline the relationship between type ii errors and alpha levels
    Set up and visualize data for the paired difference t-test
    Perform the paired t-test on paired samples
    Use the paired t-test to compare before and after values
    Perform paired t-tests with varying outcomes for the null hypothesis
    Summarize the key concepts covered in this course

IN THIS COURSE

  • 1m 46s
  • 11m 12s
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    3.  Performing Levene's Test
    7m 27s
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    4.  Comparing Means Using the Two-sample T-test
    8m 52s
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    5.  Understanding Welch's T-test
    12m 8s
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    6.  Comparing Means Using Welch's T-test
    9m 18s
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    7.  Understanding Type I and Type II Errors
    9m 19s
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    8.  Exploring Type I Errors and Alpha Levels
    10m 44s
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    9.  Exploring Type II Errors and Alpha Levels
    10m 35s
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    10.  Introducing the Paired Difference T-test
    11m 15s
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    11.  Preparing Data for the Paired T-test
    11m 2s
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    12.  Using Paired T-tests
    10m 28s
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    13.  Comparing Before and After Data with Paired T-tests
    9m 31s
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    14.  Course Summary
    2m 2s

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