condition mean min max ZT0-3 4.748176303999999 4.369957875 5.126394733 ZT4-7 2.2958122055 2.2445863665 2.3470380444999996 ZT8-11 3.77245026175 2.7874063375 4.757494186 ZT12-15 5.402947048 5.20035618 5.605537915999999 ZT16-19 4.877916448000001 4.2962692105 5.4595636855 ZT20-23 10.3357832775 8.120378635 12.55118792