Course Content
Learning Statistics with Python
2. Mean, Median and Mode with Python
3. Variance and Standard Deviation
4. Covariance vs Correlation
Learning Statistics with Python
Paired t-test
The following function performs a paired t-test.
It is similar to the one for independent samples, but here we do not obligate to check the homogeneity of variance. Paired t-test does not assume that variances are equal.
To perform a paired t-test, samples' sizes must be equal.
Knowing this, you can move to the task where you will perform a paired t-test.
Here you have data about the number of downloading one app; look at the samples: the mean values are almost equal.
Task
We state the hypotheses:
- H₀: the mean number of downloading before and after changes are similar.
- Hₐ: the mean number of downloads is larger after modifications.
Conduct paired t-test with such alternative hypothesis, setting before
and after
as the samples.
Everything was clear?