condition mean min max ZT0-3 87.47758333333333 81.10485 96.77000000000001 ZT4-7 62.982150000000004 62.982150000000004 62.982150000000004 ZT8-11 41.016 41.016 41.016 ZT12-15 46.8536 40.176249999999996 53.530950000000004 ZT16-19 50.99975 50.99975 50.99975 ZT20-23 72.2478 72.2478 72.2478