condition mean min max ZT0-3 115.868 115.868 115.868 ZT4-7 90.57865 90.57865 90.57865 ZT8-11 93.3672 93.3672 93.3672 ZT12-15 64.82385000000001 64.82385000000001 64.82385000000001 ZT16-19 127.172 127.172 127.172 ZT20-23 120.0095 120.0095 120.0095