data reef;
  length reef $ 20;
  input reef distance density;
cards;
Middle_Reef 3.5 1.337
Middle_Reef 3.5 1.216
Middle_Reef 3.5 1.309
Alma_Bay 14.3 1.053
Alma_Bay 14.3 1.082
Alma_Bay 14.3 1.079
Orpheus_Is. 15.4 1.236
Orpheus_Is. 15.4 1.19
Orpheus_Is. 15.4 1.299
Pandora_Reef 15.9 1.246
Pandora_Reef 15.9 1.298
Pandora_Reef 15.9 1.301
Great_Palm_Is. 27.8 1.375
Great_Palm_Is. 27.8 1.384
Great_Palm_Is. 27.8 1.307
Morinda_Shoals 29.6 1.436
Morinda_Shoals 29.6 1.493
Morinda_Shoals 29.6 1.469
Little_Broadhurst 49.5 1.387
Little_Broadhurst 49.5 1.437
Little_Broadhurst 49.5 1.433
Bowden_Reef 67.9 1.406
Bowden_Reef 67.9 1.402
Bowden_Reef 67.9 1.428
Grub_Reef 74.5 1.437
Grub_Reef 74.5 1.589
Grub_Reef 74.5 1.461
;
run;