condition mean min max ZT0-3 9.77141 8.882670000000001 10.66015 ZT4-7 10.244810000000001 10.244810000000001 10.244810000000001 ZT8-11 4.179435 4.179435 4.179435 ZT12-15 0 0 0 ZT16-19 5.0467949999999995 5.0467949999999995 5.0467949999999995 ZT20-23 12.1217 12.1217 12.1217