Day 25: STA205 - Introduction to Statistical Methods

Last time

Next time

• Announcements:
  • Your quiz is returned.

  • This Thursday -- next time -- we have an exam over packets 6-10. We'll review today. I do want to go over two kinds of examples, however, before I turn things over to you.

  • By the way: the point totals on IMath don't matter. Only your total percentages do. All quizzes are equal, all hw assignments are equal. And I drop your two lowest of each before I assign the total points in those categories.

• Today:
  • A chi-square example.

  • An example showing one of the (several) reasons why we move to the sample mean.

  • Now: your questions over packets 6-10.

• Links:
  • The Standard Normal Table of probabilities.
  • Computing chi-squares in Statcrunch is carried out using the

    Stat -> Tables -> Contingency ->

    (then either data or summary, depending on what you have)

  • Here's a Mathematica demo about QQ-Plots.