condition mean min max ZT0-3 13285.07872 13285.07872 13285.07872 ZT4-7 12744.65958 12744.65958 12744.65958 ZT8-11 11465.500235 11465.500235 11465.500235 ZT12-15 12310.454395 12310.454395 12310.454395 ZT16-19 12751.140060000002 12751.140060000002 12751.140060000002 ZT20-23 10146.254494 10146.254494 10146.254494