condition mean min max ZT0-3 0.08655801666666667 0.0 0.2020664 ZT4-7 0.11233615000000001 0.11233615000000001 0.11233615000000001 ZT8-11 0.03445315 0.03445315 0.03445315 ZT12-15 0.055184025 0.02292615 0.08744189999999999 ZT16-19 0.0325097 0.0325097 0.0325097 ZT20-23 0.0366783 0.0366783 0.0366783