condition mean min max ZT0-3 0.48453900000000005 0.48453900000000005 0.48453900000000005 ZT4-7 0.331281 0.331281 0.331281 ZT8-11 0.453848 0.453848 0.453848 ZT12-15 0.616162 0.616162 0.616162 ZT16-19 0.866383 0.866383 0.866383 ZT20-23 0.5280975 0.5280975 0.5280975