condition mean min max ZT0-3 9.538025 9.538025 9.538025 ZT4-7 10.0690645 10.0690645 10.0690645 ZT8-11 9.562642499999999 9.562642499999999 9.562642499999999 ZT12-15 9.997782999999998 9.997782999999998 9.997782999999998 ZT16-19 10.399391999999999 10.399391999999999 10.399391999999999 ZT20-23 9.627186 9.627186 9.627186