condition mean min max ZT0-3 127.567474 127.567474 127.567474 ZT4-7 105.750585 105.750585 105.750585 ZT8-11 100.681835 100.681835 100.681835 ZT12-15 89.26458299999999 89.26458299999999 89.26458299999999 ZT16-19 96.422886 96.422886 96.422886 ZT20-23 86.08218249999999 86.08218249999999 86.08218249999999