Scores in the first and fourth (final) rounds for a sample of 20 golfers who competed in golf tournaments are shown in the following table.

First Final First Final Player Round Round Player Round Round Golfer 1 70 72 Golfer 11 72 72 Golfer 2 71 72 Golfer 12 72 70 Golfer 3 70 75 Golfer 13 70 73 Golfer 4 72 71 Golfer 14 70 76 Golfer 5 70 69 Golfer 15 68 70 Golfer 6 67 67 Golfer 16 68 66 Golfer 7 71 67 Golfer 17 71 70 Golfer 8 68 74 Golfer 18 70 68 Golfer 9 67 71 Golfer 19 69 68 Golfer 10 70 69 Golfer 20 67 71