Long Data vs. Wide Data

This tutorial first explains what long data and wide data are. Further, it provides two perspectives to explain the differences between long data and wide data. Finally, I show how wide versus long data impact the t-test in Excel and R software.

Tutorial Content
0:00 - Data examples for long and wide data
1:05 - Difference between long and wide data (Perspective 1 - Repeated values or not)
2:01 - Difference between long and wide data (Perspective 2 - X-Y or IV - DV framework)
3:31 - Long vs. Wide data in Excel (t-test example)
5:18 - Long vs. Wide data in R (using the function of t.test() as examples)

Slides used in the tutorial:
https://github.com/tidydatayt/long_wide_data/blob/main/long_vs_wide_data_FINAL.pdf

R code used in the tutorial:
https://github.com/tidydatayt/long_wide_data/blob/main/long_wide_data_t_test.R

Disclaimer:
The accuracy and comprehensiveness of this tutorial (& the slides/pdf) are not assured. It is advisable to verify independently or seek advice from professionals. The author of this tutorial (& the slides/pdf) bears no responsibility or liability for its accuracy and completeness.

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