condition mean min max ZT0-3 0.54144175 0.38260900000000003 0.7002745 ZT4-7 0.447396 0.447396 0.447396 ZT8-11 0.443894 0.443894 0.443894 ZT12-15 0 0 0 ZT16-19 0.43894350000000004 0.43894350000000004 0.43894350000000004 ZT20-23 0.43910950000000004 0.43910950000000004 0.43910950000000004