condition mean min max ZT0-3 2.02072 1.781335 2.2601050000000003 ZT4-7 1.6929349999999999 1.6929349999999999 1.6929349999999999 ZT8-11 2.761285 2.761285 2.761285 ZT12-15 0 0 0 ZT16-19 2.79113 2.79113 2.79113 ZT20-23 2.5609450000000002 2.5609450000000002 2.5609450000000002