condition mean min max ZT0-3 4375.8150000000005 4375.8150000000005 4375.8150000000005 ZT4-7 4876.715 4876.715 4876.715 ZT8-11 4958.77 4958.77 4958.77 ZT12-15 4296.780000000001 4296.780000000001 4296.780000000001 ZT16-19 3231.09 3231.09 3231.09 ZT20-23 4131.29 4131.29 4131.29