condition mean min max ZT0-3 148.92218333333332 16.38455 222.38049999999998 ZT4-7 18.7334 18.7334 18.7334 ZT8-11 9.60564 9.60564 9.60564 ZT12-15 61.606875 32.6035 90.61025000000001 ZT16-19 101.1105 101.1105 101.1105 ZT20-23 185.4625 185.4625 185.4625