condition mean min max ZT0-3 565.018886 565.018886 565.018886 ZT4-7 571.077005 571.077005 571.077005 ZT8-11 464.86100250000004 464.86100250000004 464.86100250000004 ZT12-15 406.914734 406.914734 406.914734 ZT16-19 263.517483 263.517483 263.517483 ZT20-23 317.4446715 317.4446715 317.4446715