condition mean min max ZT0-3 319.25 319.25 319.25 ZT4-7 410.9 410.9 410.9 ZT8-11 523.6 523.6 523.6 ZT12-15 528.8499999999999 528.8499999999999 528.8499999999999 ZT16-19 375.7 375.7 375.7 ZT20-23 406.8 406.8 406.8