condition mean min max ZT0-3 42.207134 42.207134 42.207134 ZT4-7 78.033878 78.033878 78.033878 ZT8-11 131.05970000000002 131.05970000000002 131.05970000000002 ZT12-15 109.6653225 109.6653225 109.6653225 ZT16-19 110.8410235 110.8410235 110.8410235 ZT20-23 95.576756 95.576756 95.576756