condition mean min max ZT0-3 10.7680425 10.658850000000001 10.877234999999999 ZT4-7 10.88475 10.88475 10.88475 ZT8-11 11.9467 11.9467 11.9467 ZT12-15 0 0 0 ZT16-19 13.34775 13.34775 13.34775 ZT20-23 11.5932 11.5932 11.5932