Paired T test with solved example
1. Introduction A paired t-test compares the means of two related groups to determine if there is a statistically significant difference between them. This test is used when the same subjects are measured twice, such as before and after a treatment. By analyzing the differences between paired observations, the paired t-test accounts for variability within subjects, making it a powerful tool for detecting changes or effects in experiments and repeated-measures studies. 2. When to use paired t test A paired t-test is used to compare the means of two related groups to determine if there is a statistically significant difference. This test is applicable when the same subjects are measured twice or when pairs of related subjects are matched. Use a paired t-test in the following scenarios: 1. ...