condition mean min max ZT0-3 684.6292407 274.2437544 1095.014727 ZT4-7 86.10839601500001 71.890470875 100.326321155 ZT8-11 80.953465895 65.307319365 96.599612425 ZT12-15 90.518206365 80.57617064499999 100.460242085 ZT16-19 85.64620075250001 77.39496137500001 93.89744013 ZT20-23 110.0996727625 103.504785325 116.69456020000001