Consider the pairs of measurements shown in the next table.
a. Construct a scattergram for these data.
b. Plot the least Squares line on your scattergram.
c. Use a 95% confidence interval to estimate the mean value of y when xρ = 6. Plot the upper and lower bounds of the interval on your scattergram.
d. Repeat part c for xρ = 3.2 and xρ = 0.
e. Compare the widths of the three confidence intervals your constructed in parts c and d and explain why they differ.