condition mean min max ZT0-3 812.251032 812.251032 812.251032 ZT4-7 906.5888434999999 906.5888434999999 906.5888434999999 ZT8-11 1264.064486 1264.064486 1264.064486 ZT12-15 1714.2756835 1714.2756835 1714.2756835 ZT16-19 1742.9297465 1742.9297465 1742.9297465 ZT20-23 1657.1274705 1657.1274705 1657.1274705