condition mean min max ZT0-3 1008.4652922 605.5714034 1411.359181 ZT4-7 93.4364896575 91.25657874000001 95.616400575 ZT8-11 81.0227374225 77.44176777 84.60370707499999 ZT12-15 39.3732489175 29.728145325 49.01835251 ZT16-19 47.780551015 41.385838825 54.17526320499999 ZT20-23 50.8396325575 44.414098495000005 57.26516662