condition mean min max ZT0-3 10.6503 9.595849999999999 11.70475 ZT4-7 11.23187 11.23187 11.23187 ZT8-11 10.56336 10.56336 10.56336 ZT12-15 0 0 0 ZT16-19 12.7605 12.7605 12.7605 ZT20-23 9.90249 9.90249 9.90249