condition mean min max ZT0-3 12.83075 12.83075 12.83075 ZT4-7 13.60865 13.60865 13.60865 ZT8-11 10.667200000000001 10.667200000000001 10.667200000000001 ZT12-15 12.37145 12.37145 12.37145 ZT16-19 12.7158 12.7158 12.7158 ZT20-23 13.1022 13.1022 13.1022