Statistical Inference: A Short Course

Exercises

1. Given the following set of X and Y values:

a. Use Equations (12.9a) and (12.9b) to find the regression line that best fits the scatter of points (X_i, Y_i), .

b. What is the predicted value of Y given X_o = 5?

c. Verify that

2. Given the following pairs of X and Y values:

a. Use Equations (12.9a) and (12.9b) to find the least squares regression line of best fit.

b. Determine the predicted value of Y given X_o = 13.

3. For the following set of X and Y values:

a. Find the regression line of best fit via Equations (12.9a) and (12.9b).

b. What is the predicted value of Y given X_o = 20?

4. For the regression equation obtained in Exercise 12.1:

a. Determine the partitioned sums of squares table (Table 12.3).

b. Find and interpret the coefficient of determination r². ...