condition mean min max ZT0-3 0.63022675 0.25173 1.0087234999999999 ZT4-7 1.532721 1.532721 1.532721 ZT8-11 0.4987665 0.4987665 0.4987665 ZT12-15 0 0 0 ZT16-19 0.248542 0.248542 0.248542 ZT20-23 0.49860499999999996 0.49860499999999996 0.49860499999999996