condition mean min max ZT0-3 415.54999999999995 415.54999999999995 415.54999999999995 ZT4-7 357.2 357.2 357.2 ZT8-11 331.45 331.45 331.45 ZT12-15 259.65 259.65 259.65 ZT16-19 302.5 302.5 302.5 ZT20-23 350.95 350.95 350.95