condition mean min max ZT0-3 318.542185 318.542185 318.542185 ZT4-7 224.09601099999998 224.09601099999998 224.09601099999998 ZT8-11 236.758402 236.758402 236.758402 ZT12-15 282.765953 282.765953 282.765953 ZT16-19 345.604703 345.604703 345.604703 ZT20-23 376.3437535 376.3437535 376.3437535