condition mean min max ZT0-3 138.792787 138.792787 138.792787 ZT4-7 321.32209850000004 321.32209850000004 321.32209850000004 ZT8-11 365.02111 365.02111 365.02111 ZT12-15 382.695324 382.695324 382.695324 ZT16-19 248.9720565 248.9720565 248.9720565 ZT20-23 148.29513550000001 148.29513550000001 148.29513550000001