For the group of adult joggers competing in the Windy City Mini-marathon, the following are the summary statistics for annual income (X) and time to complete the race (Y):
(a) Jack L. and Linda P. have annual incomes of $12,372 and $24,812, respectively. What race times would you predict? (Hint: No calculations are necessary). (b) What general principle is illustrated by this problem?

Question

For the group of adult joggers competing in the Windy City Mini-marathon, the following are the summary statistics for annual income (X) and time to complete the race (Y):
  (a)  Jack L. and Linda P. have annual incomes of $12,372 and $24,812, respectively. What race times would you predict? (Hint: No calculations are necessary). (b) What general principle is illustrated by this problem?

Quizplus · Accepted Answer

The Answer is (a) 122.38 minutes for both
(b) when
(a) 122.38 minutes for both (b) when the best prediction for every case is

the best prediction for every case is
(a) 122.38 minutes for both (b) when the best prediction for every case is

For the Group of Adult Joggers Competing in the Windy