condition mean min max ZT0-3 0.5815302499999999 0.434121 0.7289395 ZT4-7 0.8055785 0.8055785 0.8055785 ZT8-11 0.49853000000000003 0.49853000000000003 0.49853000000000003 ZT12-15 0 0 0 ZT16-19 0.8536315000000001 0.8536315000000001 0.8536315000000001 ZT20-23 0.6430359999999999 0.6430359999999999 0.6430359999999999