23:24

Basics of ggplot (R, Tidyverse)

9:29

Saving and reading data (R Tidyverse)

9:28

Getting oriented in Rstudio (R Tidyverse)

7:05

How to go about learning (R Tidyverse)

1:40:38

Better Measurement with Item Response Theory

8:34

Understanding group by (R Tidyverse)