condition mean min max ZT0-3 4.37962376975 3.1978249105 5.561422629 ZT4-7 4.1274355555 3.0104806259999997 5.244390485 ZT8-11 6.02548747975 5.486166143 6.564808816499999 ZT12-15 5.65452229775 5.382995062999999 5.9260495325 ZT16-19 3.7075384 3.2309324334999996 4.1841443665 ZT20-23 6.694902561499999 5.852123025 7.537682097999999