Answer
Head circumference of a child whose height is 27.5 inches:
The 95% confidence interval is between 43.7588 and 44.8668 centimeters.
(for the mean head circumference of all children whose height is 27.5 inches)
The 95% prediction interval is between 42.3197 and 46.3059 centimeters.
(for the head circumference of a particular child whose height is 27.5 inches)
Work Step by Step
With the results from item (e) still available in MINITAB:
Select Stats -> Regression -> Regression -> Predict
Enter 27.5 in the first cell of the table.
Click in Options and enter the level of confidence. Click OK.
Click OK.
