condition mean min max ZT0-3 2591.95 2591.95 2591.95 ZT4-7 2086.3 2086.3 2086.3 ZT8-11 2209.55 2209.55 2209.55 ZT12-15 2254.9 2254.9 2254.9 ZT16-19 2551.1499999999996 2551.1499999999996 2551.1499999999996 ZT20-23 2740.8 2740.8 2740.8