condition mean min max ZT0-3 36.476759 36.476759 36.476759 ZT4-7 74.1711415 74.1711415 74.1711415 ZT8-11 176.480208 176.480208 176.480208 ZT12-15 154.289603 154.289603 154.289603 ZT16-19 229.678045 229.678045 229.678045 ZT20-23 80.558003 80.558003 80.558003