Reflection: Gradual Release Practice with Measures of Central Tendency - Section 2: Independent Practice


One of the major ideas in the statistics portion of this course is understanding when to use a given measure of center (mean vs. median).  I like to use questions like #7 on this independent practice in order to accomplish that goal.  First, the data is very realistic.  Second, the data set is small enough that students get to see relatively quickly how one measure is effected more than another.  Last, the one race car price is so outrageously high that it immediately gets the point across that the mean is effected more than the median.  

Students did a really nice job with understanding that the median would become a better descriptor of the data set.  Many students made comments in their description about the "mean being pulled up" because of the outlier.  This whole idea of effecting the mean is so important when you have data that is skewed in a given direction.

  Summarizing Ideas
  Gradual Release: Summarizing Ideas
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Practice with Measures of Central Tendency

Unit 5: Modeling With Statistics
Lesson 3 of 19

Objective: SWBAT apply their understanding of the concepts from the first two lessons of the unit to questions dealing with measures of central tendency.

Big Idea: This lesson gives students the opportunity to apply what they have learned about the measures of central tendency.

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