condition mean min max ZT0-3 26.270666069999997 15.240364999999999 37.30096714 ZT4-7 65.4683046925 57.658208305 73.27840108 ZT8-11 86.105214315 80.34749784499999 91.862930785 ZT12-15 89.410379445 84.16439609 94.65636280000001 ZT16-19 91.70869600750001 88.773570475 94.64382154 ZT20-23 77.5128903975 75.40415948 79.621621315