condition mean min max ZT0-3 43.4209 43.4209 43.4209 ZT4-7 50.1369 50.1369 50.1369 ZT8-11 52.051500000000004 52.051500000000004 52.051500000000004 ZT12-15 58.49745 58.49745 58.49745 ZT16-19 71.92215 71.92215 71.92215 ZT20-23 80.64635 80.64635 80.64635