condition mean min max ZT0-3 24.056388 24.056388 24.056388 ZT4-7 27.857039 27.857039 27.857039 ZT8-11 26.2486335 26.2486335 26.2486335 ZT12-15 46.1137265 46.1137265 46.1137265 ZT16-19 83.8689885 83.8689885 83.8689885 ZT20-23 98.091746 98.091746 98.091746