condition mean min max ZT0-3 13.118907 13.118907 13.118907 ZT4-7 13.348287 13.348287 13.348287 ZT8-11 13.584781499999998 13.584781499999998 13.584781499999998 ZT12-15 13.005469 13.005469 13.005469 ZT16-19 13.3543385 13.3543385 13.3543385 ZT20-23 11.634891 11.634891 11.634891