condition mean min max ZT0-3 484.838964 484.838964 484.838964 ZT4-7 331.4823105 331.4823105 331.4823105 ZT8-11 369.3966445 369.3966445 369.3966445 ZT12-15 475.8634405 475.8634405 475.8634405 ZT16-19 482.0314125 482.0314125 482.0314125 ZT20-23 511.579974 511.579974 511.579974