2. Provide an example ( other than the textbook’s) of how we would use the simple linear ...

Since we can choose, let's pick the easier of the two, simple linear regression.

Recall the difference:


Here's a scenario (it can be anything really). Let's say you're a researcher who desires to estimate students’ grades based on the number of hours they studied for an exam. The searcher takes a random sample of 50 students currently enrolled in a __(whatever)__ course and records their test grade (0 – 100) and the number of hours they studied.

Here, grade is likely DEPENDENT on the hours (INDEPENDENT variable). A reasonable r score to show a strong relationship is r > 0.7.

By the way, I'll be answering the rest of your questions tomorrow, it's 3 AM where I am