condition mean min max ZT0-3 74.7455282 54.145014509999996 95.34604189 ZT4-7 49.9800657725 46.253088475 53.70704307 ZT8-11 85.49718559499999 70.389491755 100.604879435 ZT12-15 112.8498562 103.550313 122.14939940000001 ZT16-19 103.1871544475 98.22868259500001 108.1456263 ZT20-23 85.53235703749999 81.616949955 89.44776412