condition mean min max ZT0-3 0.15219747649999998 0.12419441099999999 0.180200542 ZT4-7 0.31328513275 0.24050865349999997 0.386061612 ZT8-11 2.02271931025 0.370486683 3.6749519375 ZT12-15 7.0035654905 5.474659655 8.532471326 ZT16-19 3.9653718772499995 3.4815465899999998 4.449197164499999 ZT20-23 1.2092531875 0.7687479365 1.6497584385000001