condition mean min max ZT0-3 53.0709 53.0709 53.0709 ZT4-7 46.1071 46.1071 46.1071 ZT8-11 35.42725 35.42725 35.42725 ZT12-15 36.3887 36.3887 36.3887 ZT16-19 47.7072 47.7072 47.7072 ZT20-23 49.659000000000006 49.659000000000006 49.659000000000006