# Lesson Archives

1. ## Paired T-Test Formula

Describes the paired t-test formula, which is used to compare the means of two related groups or samples.
2. ## Independent T-Test Formula

Describes the independent t-test formula, which is used to compare the means of two independent groups. You will learn the Student t-test formula and the Weltch t-test formula.
3. ## One Sample T-Test Formula

Describes the one sample t-test formula, which is used to compare the mean of one sample to a known standard mean.
4. ## T-Test Formula

Describes the t-test formula for one-sample, two-independent samples and paired samples t-test.
5. ## Pairwise T-Test

Describes how to compute the pairwise T-test in R between groups with corrections for multiple testing. The pairwise t-test consists of calculating multiple t-test between all possible combinations of groups. You will learn how to: 1) Calculate pairwise t-test for unpaired and paired groups; 2) Display the p-values on a boxplot.
6. ## Paired T-Test

Describes the paired t-test, which is used to compare the mean of two related groups of samples. You will learn the formula, assumptions, calculation, visualization, effect size measure using the Cohen's d, interpretation and reporting in R.
7. ## Welch T-Test

Describes the Welch t-test, which is used to compare the mean of two independent groups. You will learn the formula, assumptions, calculation, visualization, effect size measure using the Cohen's d, interpretation and reporting in R.
8. ## Student's T-Test

Describes the Student's t-test, which is used to compare the mean of two independent groups. You will learn the formula, assumptions, calculation, visualization, effect size measure using the Cohen's d, interpretation and reporting in R.
9. ## Unpaired T-Test

Describes the unpaired t-test, which is used to compare the mean of two independent groups. You will learn the formula, assumptions, calculation, visualization, effect size measure using the Cohen's d, interpretation and reporting in R. The Student's t-test and the Welch t-test are described.
10. ## One Sample T-Test

Describes the one-sample t-test, which is used to compare the mean of one sample to a known standard (or theoretical / hypothetical) mean. You will learn the formula, assumptions, calculation, visualization, effect size measure using the Cohen's d, interpretation and reporting in R.