condition mean min max ZT0-3 6.79193 5.715275 7.8685849999999995 ZT4-7 4.1904900000000005 4.1904900000000005 4.1904900000000005 ZT8-11 5.43412 5.43412 5.43412 ZT12-15 0 0 0 ZT16-19 7.62891 7.62891 7.62891 ZT20-23 6.19225 6.19225 6.19225