condition mean min max ZT0-3 453.319 453.319 453.319 ZT4-7 427.6995 427.6995 427.6995 ZT8-11 420.055 420.055 420.055 ZT12-15 437.17900000000003 437.17900000000003 437.17900000000003 ZT16-19 476.20550000000003 476.20550000000003 476.20550000000003 ZT20-23 491.4613333333333 491.4613333333333 491.4613333333333