condition mean min max ZT0-3 75.108567 75.108567 75.108567 ZT4-7 42.056110000000004 42.056110000000004 42.056110000000004 ZT8-11 47.217291 47.217291 47.217291 ZT12-15 311.865085 311.865085 311.865085 ZT16-19 71.037226 71.037226 71.037226 ZT20-23 245.83662550000003 245.83662550000003 245.83662550000003