condition mean min max ZT0-3 44.108741 44.108741 44.108741 ZT4-7 38.4323195 38.4323195 38.4323195 ZT8-11 43.607516000000004 43.607516000000004 43.607516000000004 ZT12-15 45.059252 45.059252 45.059252 ZT16-19 45.1556005 45.1556005 45.1556005 ZT20-23 38.559973 38.559973 38.559973