condition mean min max ZT0-3 4.686462499999999 4.543375 4.829549999999999 ZT4-7 5.281555 5.281555 5.281555 ZT8-11 13.5025 13.5025 13.5025 ZT12-15 0 0 0 ZT16-19 10.95559 10.95559 10.95559 ZT20-23 5.736745 5.736745 5.736745