condition mean min max ZT0-3 31.2874688425 25.721968115000003 36.85296957 ZT4-7 24.33114487 21.978262045 26.684027694999997 ZT8-11 34.269789579999994 28.825268174999998 39.714310985 ZT12-15 48.52688008 38.406683645 58.647076514999995 ZT16-19 60.7477231775 59.383275239999996 62.112171115 ZT20-23 59.42017053 57.841225595 60.999115465