Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

Session 2, Part A:
Patterns in Variation (10 minutes)

 To answer a statistical question, we collect data, which consist of measurements of a variable. When the measurements we collect differ from each other, variation exists. We can examine this variation in several ways to find interesting answers to the statistical questions we pose. For example, we can look at the distribution of a data set -- the different values and how often each occurs -- to draw out informative patterns in the variation. Tabular and graphical representations of the data can help to display these patterns. In the video segment below, Professor Kader and the participants examine the distribution of a data set to help explain an intriguing aspect of the variation they find. Professor Kader also introduces the uses of graphical and tabular representations. Note 2

 Video Segment In Problem H2 of Session 1, you looked at the mint marks of 100 Jefferson nickels. Then you answered a series of questions about those coins. In this video segment, the onscreen participants examine the distribution of coins to come up with a hypothesis about where the coins without mint marks (N) were minted. After you watch the video segment, reflect on the questions below. If you're using a VCR, you can find this segment on the session video approximately 8 minutes and 30 seconds after the Annenberg Media logo. The second part of this segment begins approximately 10 minutes and 3 seconds after the Annenberg Media logo.

 Problem A1 Did you arrive at the same conclusions about where the coins were minted as the onscreen participants did? Was your reasoning similar or different from theirs?

Next > Part B: Line Plots

 Session 2: Index | Notes | Solutions | Video