The tasks for this month's contest are available [here][1]. The tasks are also listed below for convenience. The data is available [here][2]. If you would like the codebook for the dataset, it can be accessed [here][3]. The entry form (google form) is available [here][4]. The contest will run until July 31st (latest time zone on earth). Please contact Kelly Cuccolo (kcuccolo@mivu.org) with any questions. **July Tasks** Data processing (level 1) 1. Write a script that will filter out participants who don’t have any siblings Descriptive Statistics (level 2) 1. Create a variable called SUmarij by adding YRBS8 + YRBS14 2. Find the average number of times participants have used marijuana. 3. Transform SUmarij into a binary variable where 0 = never used marijuana, and 1 = has used marijuana Data visualization (level 3) 1. Use cross-tabs to make a table that shows the counts of marijuana use (never used/has used) by gender Inferential statistics (level 4) 1. Test if there is an association between marijuana use and number of siblings someone has [1]: https://osf.io/fu3vm [2]: https://osf.io/fu3vm [3]: https://osf.io/ey7ph [4]: https://forms.gle/swKDQhtL1f9FuYnb9