Overview
Inference as a Decision-Making and Communication Tool
Consider the following two charts, representing the same data and two different regression lines, without indicating the value of R2:[Image unavailable: graph 1: scatter chart with linear regression, showing a certain trend.][Image unavailable: graph 2: scatter chart, with the same data points as the other chart, with a non-linear regression showing a different trend]
Start by thinking of what the two regression curves are indicating regarding the initial trend of the curve (until day 10), and what the modeling is predicting for day 20.
Then, reflect on:
- The importance of choosing adequate regression models when making inferences.
- The importance of regression models for decision-making.
- How the choice of regression lines can be a tool to “sell an idea”.