# The following data represent the number of days absent, x, and the ï¬nal grade, y, for a sample of college

## Question:

(a) Find the least-squares regression line treating number of absences as the explanatory variable and ï¬nal grade as the response variable.

(b) Interpret the slope and y-intercept, if appropriate.

(c) Predict the ï¬nal grade for a student who misses ï¬ve class periods and compute the residual. Is the ï¬nal grade above or below average for this number of absences?

(d) Draw the least-squares regression line on the scatter diagram of the data.

(e) Would it be reasonable to use the least-squares regression line to predict the ï¬nal grade for a student who has missed 15 class periods? Why or why not?

## This problem has been solved!

Do you need an answer to a question different from the above? Ask your question!

## Step by Step Answer:

**Related Book For**

**View Solution**

Create a free account to access the answer

**Cannot find your solution?**

Post a FREE question now and get an answer within minutes.
* Average response time.