44 Sweetness of orange juice. Refer to the study of the quality of orange juice produced at a juice manufacturing plant, Exercise 28 . The data are saved in the OJUICE file.

Recall that simple linear regression was used to predict the sweetness index ( y ) from the amount of pectin ( x ) in orange juice manufactured during a production run.

a. Give the values of SSE, s 2 , and s for this regression.

b. Explain why it is difficult to give a practical interpretation to s 2 .

c. Use the value of s to derive a range within which most (about 95%) of the errors of prediction of sweetness index fall.