Create Worksheet 3A

[iciarfernandez]

Here is Worksheet 3A, some notes:

• Following today's teaching team meeting, I have cut down on some content - there are a total of 11 autograded questions, one extra non-autograded practice question at the end of the ggplot section of the worksheet, and two non-autograded tasks within the dplyr section of the worksheet. Let me know what you think! If it seems too short now I can add a few more exercises, I'm not sure of how long it will take.

• Didn't ask at the meeting today, but given that team ASDA is now working on the worksheets (and will hopefully implement the autograder for this worksheet), should the content of the worksheet (i.e. this pull request) be reviewed before or after they implement the autograder? I'm thinking before in case adjustments need to be made?

Thank you!

[dy-lin]

@sciclic aren't we doing worksheet dev on https://github.com/UBC-STAT/stat-545-instructor? The location of this current worksheet is where we are placing the student-facing worksheets for them to download from.

I believe the worksheet should be in stat-545-instructor/worksheets/source/worksheet_03a/worksheet_03a.ipynb

[dy-lin]

I've implemented the empty code cell as it was implemented for worksheet04a.

[iciarfernandez]

Thank you @dy-lin, just opened a pull request with this same worksheet in the right repo (sorry again) - I think we should close this push request and delete the file from this repo?

[wvictor14]

Yeah the concern is just other students seeing the solutions. Probably best to just delete the whole branch here so it isn't in the history?