Discussion: What is this residual plot telling us about the relationship between speed and braking distance? Let’s now end by discussing how to interpret.

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The plot below shows residuals from a simple regression. What, if anything, is of greatest concerning about these residuals? (A) They exhibit heteroscedasticity.
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Presentation transcript:

Discussion: What is this residual plot telling us about the relationship between speed and braking distance? Let’s now end by discussing how to interpret the residual plots below…

Discussion: 1. Can we come up with any general rules in regards to interpreting residual plots?

Quote of the week: “Correlation Is Not Causation” Correlation does NOT mean that one thing causes the other. There could be other reasons the data has a good correlation

Example: Sunglasses vs Ice Cream Our Ice Cream shop finds how many sunglasses were sold by a big store for each day and compares them to their ice cream sales: The correlation between Sunglasses and Ice Cream sales is _______. Does this mean that sunglasses make people want ice cream?

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