condition mean min max ZT0-3 687.078211 687.078211 687.078211 ZT4-7 497.580854 497.580854 497.580854 ZT8-11 490.306658 490.306658 490.306658 ZT12-15 408.04607799999997 408.04607799999997 408.04607799999997 ZT16-19 599.9079755 599.9079755 599.9079755 ZT20-23 716.3035035 716.3035035 716.3035035