condition mean min max ZT0-3 213.40050000000002 213.40050000000002 213.40050000000002 ZT4-7 171.068 171.068 171.068 ZT8-11 146.488 146.488 146.488 ZT12-15 153.3095 153.3095 153.3095 ZT16-19 218.93200000000002 218.93200000000002 218.93200000000002 ZT20-23 235.7855 235.7855 235.7855