condition mean min max ZT0-3 5.49151 5.49151 5.49151 ZT4-7 5.3394699999999995 5.3394699999999995 5.3394699999999995 ZT8-11 5.30153 5.30153 5.30153 ZT12-15 5.33697 5.33697 5.33697 ZT16-19 5.2993 5.2993 5.2993 ZT20-23 5.39888 5.39888 5.39888