condition mean min max ZT0-3 853.4000000000001 853.4000000000001 853.4000000000001 ZT4-7 1045.0 1045.0 1045.0 ZT8-11 901.1 901.1 901.1 ZT12-15 676.6 676.6 676.6 ZT16-19 403.8 403.8 403.8 ZT20-23 541.8 541.8 541.8