condition mean min max ZT0-3 37.734146 37.734146 37.734146 ZT4-7 35.3416975 35.3416975 35.3416975 ZT8-11 43.0559995 43.0559995 43.0559995 ZT12-15 32.383312000000004 32.383312000000004 32.383312000000004 ZT16-19 29.1618195 29.1618195 29.1618195 ZT20-23 26.4851035 26.4851035 26.4851035