condition mean min max ZT0-3 0.7527325 0.0 1.505465 ZT4-7 1.5278049999999999 1.5278049999999999 1.5278049999999999 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 1.507365 1.507365 1.507365