Chapter 12.4, Problem 63E

a.

To determine

Construct the 99% confidence intervals for the regression coefficients.

b.

To determine

Obtain the 99% confidence interval of mean useful range for $\text{brightness}=70$ and $\text{contrast}=80$.

c.

To determine

Obtain the 99% prediction interval of mean useful range for $\text{brightness}=70$ and $\text{contrast}=80$.

d.

To determine

Obtain the 99% confidence interval and 99% prediction interval of mean useful range for $\text{brightness}=50$ and $\text{contrast}=25$.

Explain the difference in widths of the intervals.