condition mean min max ZT0-3 0.0736700495 0.0 0.147340099 ZT4-7 0.69060397025 0.41804800799999997 0.9631599325 ZT8-11 1.3357803645 1.2320648135 1.4394959154999998 ZT12-15 1.06601180125 0.7798079435 1.3522156589999998 ZT16-19 0.6731374379999999 0.468902617 0.8773722589999999 ZT20-23 1.100564414 0.891194485 1.3099343430000001