Please complete the "Intro to Residual Plots" worksheet provided in class!
- Intro to Residual Plots
- This assignment will help us to explore how to create residual plots and what they tell us!
- What is a residual plot?
- A graph that shows the residuals on our y axis and the x values (or sometimes predicted y values) on our x axis!
- Question 1/2 (there really isn't a question 1, just use the info in 1 to do 2):
- Use the equation given and/or the graph shown to find the residual for each point
- Then, create a residual plot below using these answers to #1:
- Label your x axis of the residual plot with the same x-values from the scatter plot
- Plot points to represent each residual
- Coordinates = (xcoordinate, residual for that point)
- Question 3:
- 3a, 3b--you got this
- 3c--think about what part of the residual plot represents the LSRL and what the residual plot is showing us about the line/points
- The only bad answer here is a blank paper! Think!
- Question 4:
- Now, try to sketch a residual plot without using any numbers based on the scatter plot show...
- Consider your answer to 3c
- Consider how your residual plot in #2 compares to the graph in #1
- Consider what you know about positive and negative residuals--think about how many points should be positive residuals and how many should be negative, as well as if any points should have a residual of 0!
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