condition mean min max ZT0-3 0.07844923333333334 0.0 0.1187707 ZT4-7 0.2752892 0.2752892 0.2752892 ZT8-11 0.772317 0.772317 0.772317 ZT12-15 1.0482405000000001 0.8936810000000001 1.2028 ZT16-19 0.556447 0.556447 0.556447 ZT20-23 0.2244425 0.2244425 0.2244425