## 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

# Practice with Measures of Central Tendency

Unit 5: Modeling With Statistics
Lesson 3 of 19

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

Print Lesson
5 teachers like this lesson
Standards:
Subject(s):
Math, measures of central tendency, Statistics, modeling, mean, median, mode, range, 9th grade
41 minutes

### James Bialasik

##### Similar Lessons

Algebra I » Data and Statistics
Big Idea: How would you determine how spread out a data set is? Students put data sets in order from least to most spread out based on their own intuition and reasoning.
Favorites(2)
Resources(15)
Boston, MA
Environment: Urban

###### The Stroop Effect
12th Grade Math » Statistics: Data in One Variable
Big Idea: Students are active participants in John Ridley Stroop's famous experiment, which provides them with tangible reasons for the shape, center, and spread of a data set to change.
Favorites(3)
Resources(16)
Worcester, MA
Environment: Urban

###### Our City Statistics Project and Assessment
Algebra I » Our City Statistics: Who We Are and Where We are Going
Big Idea: Students demonstrate interpersonal and data literacy skills as use statistics to learn about their community.
Favorites(10)
Resources(17)
Salem, MA
Environment: Urban