condition mean min max ZT0-3 10.060756666666666 9.387139999999999 10.439565 ZT4-7 5.597905 5.597905 5.597905 ZT8-11 5.53367 5.53367 5.53367 ZT12-15 8.4610175 8.364325000000001 8.55771 ZT16-19 7.118475 7.118475 7.118475 ZT20-23 10.274149999999999 10.274149999999999 10.274149999999999