condition mean min max ZT0-3 132.932197 132.932197 132.932197 ZT4-7 137.12616350000002 137.12616350000002 137.12616350000002 ZT8-11 127.8598885 127.8598885 127.8598885 ZT12-15 132.8227865 132.8227865 132.8227865 ZT16-19 137.27712200000002 137.27712200000002 137.27712200000002 ZT20-23 146.8476995 146.8476995 146.8476995