condition mean min max ZT0-3 0.6120365 0.48841049999999997 0.7087605 ZT4-7 0.614255 0.614255 0.614255 ZT8-11 0.6664685 0.6664685 0.6664685 ZT12-15 1.31123025 1.0785305 1.54393 ZT16-19 1.23489 1.23489 1.23489 ZT20-23 1.050668 1.050668 1.050668