condition mean min max ZT0-3 1147.238753 1147.238753 1147.238753 ZT4-7 1349.5057295000001 1349.5057295000001 1349.5057295000001 ZT8-11 1000.831575 1000.831575 1000.831575 ZT12-15 1159.1602014999999 1159.1602014999999 1159.1602014999999 ZT16-19 1093.3669519999999 1093.3669519999999 1093.3669519999999 ZT20-23 692.1422375 692.1422375 692.1422375