condition mean min max ZT0-3 19.12175 17.8493 20.3942 ZT4-7 11.805250000000001 11.805250000000001 11.805250000000001 ZT8-11 4.979715000000001 4.979715000000001 4.979715000000001 ZT12-15 0 0 0 ZT16-19 11.436399999999999 11.436399999999999 11.436399999999999 ZT20-23 14.3209 14.3209 14.3209