condition mean min max ZT0-3 0.32499083333333334 0.0 0.9749725 ZT4-7 0.745622 0.745622 0.745622 ZT8-11 1.750763 1.750763 1.750763 ZT12-15 0.80292825 0.582015 1.0238415 ZT16-19 1.251235 1.251235 1.251235 ZT20-23 1.6427550000000002 1.6427550000000002 1.6427550000000002