condition mean min max ZT0-3 39.97253333333334 23.3136 62.834500000000006 ZT4-7 51.0403 51.0403 51.0403 ZT8-11 39.2677 39.2677 39.2677 ZT12-15 30.27495 19.50385 41.04605 ZT16-19 35.2275 35.2275 35.2275 ZT20-23 30.43075 30.43075 30.43075