condition mean min max ZT0-3 9.844154 9.844154 9.844154 ZT4-7 16.025283 16.025283 16.025283 ZT8-11 13.985217 13.985217 13.985217 ZT12-15 23.0607435 23.0607435 23.0607435 ZT16-19 26.4708175 26.4708175 26.4708175 ZT20-23 66.1594245 66.1594245 66.1594245