condition mean min max ZT0-3 19.79485 19.79485 19.79485 ZT4-7 13.353349999999999 13.353349999999999 13.353349999999999 ZT8-11 12.4207 12.4207 12.4207 ZT12-15 15.35895 15.35895 15.35895 ZT16-19 23.5225 23.5225 23.5225 ZT20-23 24.81745 24.81745 24.81745