Two intervals are given, A and B, for the same value of the explanatory variable.

A: 18.3 to 21.7 ;

B: 16.2 to 23.8 ;

(a) Which interval is the confidence interval for the mean response? Choose the answer from the menu in accordance to item (a) of the question statement BA Which interval is the prediction interval for the response? Choose the answer from the menu in accordance to item (a) of the question statement AB (b) What is the predicted value of the response variable for this value of the explanatory variable? Enter the exact answer. The predicted value is Enter your answer in accordance to item (b) of the question statement .