condition mean min max ZT0-3 11.0522 10.783349999999999 11.32105 ZT4-7 6.879175 6.879175 6.879175 ZT8-11 7.866575 7.866575 7.866575 ZT12-15 0 0 0 ZT16-19 11.37305 11.37305 11.37305 ZT20-23 11.255500000000001 11.255500000000001 11.255500000000001