condition mean min max ZT0-3 0.38396783333333334 0.24363 0.48496300000000003 ZT4-7 0.2289315 0.2289315 0.2289315 ZT8-11 0.296078 0.296078 0.296078 ZT12-15 0.8225925000000001 0.7775535 0.8676315000000001 ZT16-19 0.563606 0.563606 0.563606 ZT20-23 0.822316 0.822316 0.822316