condition mean min max ZT0-3 131.53725 116.3665 146.708 ZT4-7 159.7955 159.7955 159.7955 ZT8-11 292.9085 292.9085 292.9085 ZT12-15 0 0 0 ZT16-19 333.83349999999996 333.83349999999996 333.83349999999996 ZT20-23 208.54500000000002 208.54500000000002 208.54500000000002