condition mean min max ZT0-3 4.872154999999999 4.851565 4.892745 ZT4-7 8.143180000000001 8.143180000000001 8.143180000000001 ZT8-11 32.5904 32.5904 32.5904 ZT12-15 0 0 0 ZT16-19 16.18855 16.18855 16.18855 ZT20-23 7.827355000000001 7.827355000000001 7.827355000000001