condition mean min max ZT0-3 9.900072 9.900072 9.900072 ZT4-7 10.364321 10.364321 10.364321 ZT8-11 10.3592725 10.3592725 10.3592725 ZT12-15 10.459958499999999 10.459958499999999 10.459958499999999 ZT16-19 10.0077325 10.0077325 10.0077325 ZT20-23 9.530287000000001 9.530287000000001 9.530287000000001