condition mean min max ZT0-3 281.934047 281.934047 281.934047 ZT4-7 515.0220615 515.0220615 515.0220615 ZT8-11 751.621063 751.621063 751.621063 ZT12-15 732.081473 732.081473 732.081473 ZT16-19 514.090305 514.090305 514.090305 ZT20-23 287.25724 287.25724 287.25724