condition mean min max ZT0-3 1.2601197485 1.185524301 1.3347151959999999 ZT4-7 4.1487083995 2.9647347105 5.3326820885 ZT8-11 10.94963664375 9.295497436 12.6037758515 ZT12-15 10.92907273025 10.894634395 10.9635110655 ZT16-19 9.265615651 8.560751898 9.970479403999999 ZT20-23 10.751447887249999 10.1368164345 11.366079339999999