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

Statistics    |    Expert
• 14 videos | 2h 5m 38s
• Includes Assessment
Rating 4.9 of 8 users (8)
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

• 3.  Performing Levene's Test
• 4.  Comparing Means Using the Two-sample T-test
• 5.  Understanding Welch's T-test
• 6.  Comparing Means Using Welch's T-test
• 7.  Understanding Type I and Type II Errors
• 8.  Exploring Type I Errors and Alpha Levels
• 9.  Exploring Type II Errors and Alpha Levels
• 10.  Introducing the Paired Difference T-test
• 11.  Preparing Data for the Paired T-test
• 12.  Using Paired T-tests
• 13.  Comparing Before and After Data with Paired T-tests
• 14.  Course Summary

## EARN A DIGITAL BADGE WHEN YOU COMPLETE THIS COURSE

Skillsoft is providing you the opportunity to earn a digital badge upon successful completion on some of our courses, which can be shared on any social network or business platform.

Digital badges are yours to keep, forever.

## YOU MIGHT ALSO LIKE

Rating 4.6 of 34 users (34)

## PEOPLE WHO VIEWED THIS ALSO VIEWED THESE

Rating 5.0 of 9 users (9)
Rating 4.8 of 4 users (4)
Rating 4.6 of 36 users (36)