condition mean min max ZT0-3 153.8791666666667 138.64100000000002 165.66250000000002 ZT4-7 97.37970000000001 97.37970000000001 97.37970000000001 ZT8-11 95.24235 95.24235 95.24235 ZT12-15 115.378 110.9165 119.8395 ZT16-19 129.96699999999998 129.96699999999998 129.96699999999998 ZT20-23 149.06900000000002 149.06900000000002 149.06900000000002