condition mean min max ZT0-3 30.374139562499998 22.99587861 37.752400515 ZT4-7 31.152782745 28.062430125 34.243135365 ZT8-11 27.73205176 20.961137655 34.502965865 ZT12-15 42.7745153475 42.419178985 43.12985171 ZT16-19 37.8920637125 36.526579579999996 39.257547845 ZT20-23 39.80028617 36.29415028 43.30642206