Scatterplots


Mammals - Slope
The goal of the mammals slope activity is to develop the concept of slope by looking at the differences between the attributes height and sleep for 27 mammals. The horizontal and vertical ruler tool are used to calculate differences and a case table is used to compute rates of change.
mammals3.png


Cats - Slope and Residuals
This activity progresses from the analysis of a scatter plot of body length versus weight for 24 cats, estimating slope, and using residuals to predict the body length for a given weight.
Cats_Slope.png

MPG versus Car Weight
This tutorial takes advantage of some of the statistical functions available in TinkerPlots. This is a bit more advanced in nature. The goal is to make connections between the given data, predicted values and residuals. The context is a set of 16 cars.
Cars Predicted.png


Video Link - How to create a residual plot

I am planning on moving this next activity to a different page ...
Mammals Activity
This activity was written in 2009 by Donna Toll (Ball State Creative Teaching Grant). I really like it because students are prompted to make conjectures and comparisons about different animals (including humans) based on the different attributes provided. An example would be to describe the relationship between the animal's heights and diets. What type of graph would you use and what does it "tell" you? Sometimes my students try to use a scatter plot to answer this question because they see the word "relationship" (parallel box plots should be used). By asking students to describe the relationship between sleep and life span, students are introduced to the meaning of scatterplots - what they "tell" the reader.
Mammals Data.png


MATH 623 Roller Coasters Discussion Forum Prompt - Identify an error (or errors) in the analysis provided in the student work that is provided.