condition mean min max ZT0-3 52.04965 48.8859 55.2134 ZT4-7 32.38745 32.38745 32.38745 ZT8-11 25.432 25.432 25.432 ZT12-15 0 0 0 ZT16-19 30.07335 30.07335 30.07335 ZT20-23 46.47935 46.47935 46.47935