condition mean min max ZT0-3 14.234324999999998 12.79745 15.671199999999999 ZT4-7 26.35285 26.35285 26.35285 ZT8-11 35.169200000000004 35.169200000000004 35.169200000000004 ZT12-15 0 0 0 ZT16-19 36.9251 36.9251 36.9251 ZT20-23 42.259299999999996 42.259299999999996 42.259299999999996