condition mean min max ZT0-3 73.470825 73.470825 73.470825 ZT4-7 62.192099 62.192099 62.192099 ZT8-11 73.2049655 73.2049655 73.2049655 ZT12-15 68.8919535 68.8919535 68.8919535 ZT16-19 93.854883 93.854883 93.854883 ZT20-23 108.5023075 108.5023075 108.5023075