condition mean min max ZT0-3 0.5351808333333333 0.3586245 0.7759480000000001 ZT4-7 0.40181750000000005 0.40181750000000005 0.40181750000000005 ZT8-11 0.3559465 0.3559465 0.3559465 ZT12-15 0.64347 0.5729325000000001 0.7140075 ZT16-19 0.6211504999999999 0.6211504999999999 0.6211504999999999 ZT20-23 0.6186320000000001 0.6186320000000001 0.6186320000000001