condition mean min max ZT0-3 0.23145525 0.1172755 0.345635 ZT4-7 0.27575099999999997 0.27575099999999997 0.27575099999999997 ZT8-11 0.1555417 0.1555417 0.1555417 ZT12-15 0 0 0 ZT16-19 0.07680095 0.07680095 0.07680095 ZT20-23 0.3087515 0.3087515 0.3087515