condition mean min max ZT0-3 7.48338 7.39581 7.57095 ZT4-7 5.58827 5.58827 5.58827 ZT8-11 4.333885 4.333885 4.333885 ZT12-15 0 0 0 ZT16-19 6.3973949999999995 6.3973949999999995 6.3973949999999995 ZT20-23 5.53373 5.53373 5.53373