condition mean min max ZT0-3 15.34055 15.34055 15.34055 ZT4-7 11.5061 11.5061 11.5061 ZT8-11 12.3917 12.3917 12.3917 ZT12-15 13.4846 13.4846 13.4846 ZT16-19 18.1922 18.1922 18.1922 ZT20-23 15.20335 15.20335 15.20335