condition mean min max ZT0-3 1.9932699999999999 1.9932699999999999 1.9932699999999999 ZT4-7 1.1330580000000001 1.1330580000000001 1.1330580000000001 ZT8-11 1.655735 1.655735 1.655735 ZT12-15 5.50099 5.50099 5.50099 ZT16-19 4.32565 4.32565 4.32565 ZT20-23 3.25519 3.25519 3.25519