condition mean min max ZT0-3 2.2529675 1.8648150000000001 2.64112 ZT4-7 5.0261949999999995 5.0261949999999995 5.0261949999999995 ZT8-11 5.4245 5.4245 5.4245 ZT12-15 0 0 0 ZT16-19 4.29205 4.29205 4.29205 ZT20-23 2.96764 2.96764 2.96764