HDF  H9` TREE HEAPX datadata_descr8 (namesleep (mldata0 Hcomment"Data from StatLib (ftp stat.cmu.edu/datasets) Data from which conclusions were drawn in the article "Sleep in Mammals: Ecological and Constitutional Correlates" by Allison, T. and Cicchetti, D. (1976), _Science_, November 12, vol. 194, pp. 732-734. Includes brain and body weight, life span, gestation time, time sleeping, and predation and danger indices for 62 mammals. Variables below (from left to right) for Mammals Data Set: species of animal body weight in kg brain weight in g slow wave ("nondreaming") sleep (hrs/day) paradoxical ("dreaming") sleep (hrs/day) total sleep (hrs/day) (sum of slow wave and paradoxical sleep) maximum life span (years) gestation time (days) predation index (1-5) 1 = minimum (least likely to be preyed upon) 5 = maximum (most likely to be preyed upon) sleep exposure index (1-5) 1 = least exposed (e.g. animal sleeps in a well-protected den) 5 = most exposed overall danger index (1-5) (based on the above two indices and other information) 1 = least danger (from other animals) 5 = most danger (from other animals) Note: Missing values denoted by -999.0 For more details, see Allison, Truett and Cicchetti, Domenic V. (1976), "Sleep in Mammals: Ecological and Constitutional Correlates", _Science_, November 12, vol. 194, pp. 732-734. The above data set can be freely used for non-commercial purposes and can be freely distributed (permission in writing obtained from Dr. Truett Allison). Submitted by Roger Johnson rwjohnso@silver.sdsmt.edu Total sleep treated as the class attribute. Attributes for slow wave and paradoxical sleep have been deleted. (The animal's name has also been deleted.)  0 TREEHEAPX P double2double0int18SNOD ( ?@4 4>HLSNODHXffffff @ @)@0@333333@#@333333@@-@ffffff#@)@333333@$@@ @333333!@ffffff%@ffffff%@ffffff@2@ffffff@,@(@@*@+@ffffff @333333@%@333333"@fffff3@ @333333%@ffffff&@ffffff*@)@ffffff3@ffffff1@1@%@ffffff+@ @ @)@ffffff*@#@333333#@ffffff@@@ffffff@&@$@*@@/@$@ffffff3@@?Gz @q= ףp?@%@Zd;O?d@ffffff @GzJ@333333?}@?33333cg@333333?@Q??(\?N@@)\;@Q?i@@U@ ףp=*B@B`"۹?p= ף?H@Y@A@{Gzt?{Gz?O@Zd;??Zd;O?~jt?333333? @@o@Q?$@Q?h@@x&@Q?q= ף@333333@? @)\-@K@ffffff?Q??@9v?(\@ @333333@PpTREEh HEAPX(namesorderingtypes0'LH) H) H)  ?@4 4>8L >H!LSNOD 0L'LP,QsEw8( s '2 b  :&E2(2 "') .d      *<p#?pm**x6?DPd!2 - xs?4Z<.& H) H) H)H)H)H) H) H)H)H)H)H)H) H) H)H)GCOLpredation_indexsleep_exposure_index danger_index total_sleep max_life_spangestation_time brain_weight body_weight double2 int1 double0 numeric numericnumericnumericnumericnumericnumericnumeric