condition mean min max ZT0-3 0.368796 0.368796 0.368796 ZT4-7 0.16070555 0.16070555 0.16070555 ZT8-11 0.4577635 0.4577635 0.4577635 ZT12-15 0.079664 0.079664 0.079664 ZT16-19 0.8728969999999999 0.8728969999999999 0.8728969999999999 ZT20-23 0.3296465 0.3296465 0.3296465