condition mean min max ZT0-3 31.16645 28.9112 33.4217 ZT4-7 10.199929999999998 10.199929999999998 10.199929999999998 ZT8-11 11.0832 11.0832 11.0832 ZT12-15 0 0 0 ZT16-19 16.7474 16.7474 16.7474 ZT20-23 22.8069 22.8069 22.8069