condition mean min max ZT0-3 277.682938 277.682938 277.682938 ZT4-7 181.190642 181.190642 181.190642 ZT8-11 145.87284499999998 145.87284499999998 145.87284499999998 ZT12-15 123.283502 123.283502 123.283502 ZT16-19 193.951723 193.951723 193.951723 ZT20-23 220.0061065 220.0061065 220.0061065