condition mean min max ZT0-3 226.98366666666666 201.268 259.3835 ZT4-7 156.579 156.579 156.579 ZT8-11 163.433 163.433 163.433 ZT12-15 165.57975 159.0935 172.066 ZT16-19 193.3115 193.3115 193.3115 ZT20-23 207.8995 207.8995 207.8995