condition mean min max ZT0-3 25.27225 25.27225 25.27225 ZT4-7 15.3566 15.3566 15.3566 ZT8-11 14.52205 14.52205 14.52205 ZT12-15 9.890395000000002 9.890395000000002 9.890395000000002 ZT16-19 20.9741 20.9741 20.9741 ZT20-23 25.2977 25.2977 25.2977