condition mean min max ZT0-3 55.860675 53.146150000000006 58.575199999999995 ZT4-7 52.33095 52.33095 52.33095 ZT8-11 59.984249999999996 59.984249999999996 59.984249999999996 ZT12-15 0 0 0 ZT16-19 80.91955 80.91955 80.91955 ZT20-23 65.6032 65.6032 65.6032