Day 5: STA205 - Introduction to Statistical Methods

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• Announcements:
  • Reminder: stash your rectangles.

  • We do have a quiz today, as we will each Wednesday.

  • I hope that everyone got through their homework in IMath.
    • Some asked about very negative $z$-scores (< -3.9). The associated area (or probability) is also 0.0000, as it is for -3.9. The areas only decrease across the table, as $z$ moves from right to left.

      For very large positive $z$-scores (> 3.9), the associated area is 1.000: essentially all the area is to the left of those values of $z$.

    • Other Issues?

    • Statcrunch instructions for packet 2 (and IMath homework):
      • Load the Stop and Frisk Data for packet 2. Load it by "WWW address", and make sure to set the delimiter to "comma" (because this is a "csv" (comma-separated values) file.
      • Once the data is loaded, click on "Graph".
      • Alternatively, if you want you can join my "group" on Statcrunch. That way you can access the data more quickly. It's Sta205-Long, if you want to add yourself into that group.

  • Today: we finish up Packet 2: Summarizing Categorical Data
    • If you don't have your Packet, just take out some paper and make notes that you can use to transfer to your packet when you DO get it printed out.

• Links:
  • Video referenced in Packet 1.
  • Stop and Frisk Data for packet 2.