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Measures of Center
Graphs, Center and Spread
Median Absolute Dev
Mean Absolute Dev
Time Series Plots
Central Limit Theorem
Confidence Intervals (revised 2016)
Graduate Student Projects
Fathom Dynamic Data
Measures of Center
Why do we need a numeric value that represents a "center" of a data set and if we need one, which one should we use. The mean, median, mode are all viable options.
Do students understand that a measure of center is a single value used to describe an entire population.
The first lesson I suggest you look at was written by Todd Lunsford while he was a junior at Ball State University.
Todd uses the basic tools of TinkerPlots to answer questions about the Tall Building data set. How many buildings are higher/lower than the mean height? How many buildings are higher/lower than the median height? This activity uses version 1.0 so some of the icons might be different.
- Todd also wrote a hot dog activity where you will compare the mean and median in parallel dot plots for three different types of hot dogs (meat, beef and poultry). This is a great activity.
- (Key Curriculum)
How do Outliers Affect the Mean and Median?
is the formal name, but I call it Scooters.
Mystery Mixer Activity
- (Key Curriculum) Introduction to distributions created by random sampling from a population of 500 integers. Mystery Mixers introduces the idea of the center "clump" as students estimate the mean of a sample. The sample size is generated by the student and the hat plot is encouraged as a tool to describe the center clump.
Each of the activities in this module address parts of the CCSS Grade 6 >> Statistics and Probability Standards.
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