condition mean min max ZT0-3 1.7865315 1.078068 2.494995 ZT4-7 1.463755 1.463755 1.463755 ZT8-11 2.548826 2.548826 2.548826 ZT12-15 0 0 0 ZT16-19 5.306185 5.306185 5.306185 ZT20-23 4.97877 4.97877 4.97877