condition mean min max ZT0-3 459.0 459.0 459.0 ZT4-7 988.8 988.8 988.8 ZT8-11 823.75 823.75 823.75 ZT12-15 577.2 577.2 577.2 ZT16-19 325.6 325.6 325.6 ZT20-23 357.25 357.25 357.25