condition mean min max ZT0-3 5.106970474250001 2.0465633000000003 8.1673776485 ZT4-7 14.4786252055 13.92586288 15.031387531 ZT8-11 12.391694626 10.568294202 14.21509505 ZT12-15 48.604891332499996 46.076488499999996 51.133294164999995 ZT16-19 72.91804091750001 65.76972706 80.06635477500001 ZT20-23 63.4274524975 56.901333835 69.95357116