condition mean min max ZT0-3 25.096872 25.096872 25.096872 ZT4-7 14.956512 14.956512 14.956512 ZT8-11 10.486448500000002 10.486448500000002 10.486448500000002 ZT12-15 12.659384 12.659384 12.659384 ZT16-19 12.2131565 12.2131565 12.2131565 ZT20-23 14.620085 14.620085 14.620085