In using the Rstudio codes to answer these questions, dataset links are provided below

Main data:

https://drive.google.com/file/d/1f9XvSJ02Y4iWuqxS4x3o7KtQxHAjVHUv/view?usp=sharing

Source data:

https://drive.google.com/file/d/1w7CxoektKz_IdmSWnSu41WMFmXd_5PYJ/view?usp=sharing

https://drive.google.com/file/d/1uBaVBMBo6w6a6fP8NQNPROwSiW2byMlp/view?usp=sharing

1. A) Which of sex, handedness, or snowboard stance (include only two categories for each of these three variables) shows the strongest evidence of differing across the three different cohorts? (what is the code in Rstudio to answer the question)

B) Make a graph to showing this in the one with the strongest effect. (what is the code in Rstudio to answer the question)

discuss and submit code, results and graph(s))

2. A) From the dataset, choose a continuous variable and make the continuous independent variable into a 'high', 'medium' and 'low' categorical variable. Explain how you chose where to make the cut-offs between 'high', 'medium' and 'low'. (what is the code in Rstudio to answer the question)

B) Do males and females differ in the pattern of 'high', 'medium' and 'low'? (what is the code in Rstudio to answer the question)

C) Make a graph to show the sex difference (or lack thereof). (what is the code in Rstudio to answer the question)