ffa   age weight  skinfold
0.759 105 67 0.96
0.274 107 70 0.52
0.685 100 54 0.62
0.526 103 60 0.76
0.859  97 61 1.00
0.652 101 62 0.74
0.349  99 71 0.76
1.120 101 48 0.62
1.059 107 59 0.56
1.035 100 51 0.44
0.531 100 80 0.74
1.333 101 57 0.58
0.674 104 58 1.10
0.686  99 58 0.72
0.789 101 54 0.72
0.641 110 66 0.54
0.641 109 59 0.68
0.355 109 64 0.44
0.256 110 76 0.52
0.627 111 50 0.60