condition mean min max ZT0-3 5025.475335 5025.475335 5025.475335 ZT4-7 4732.588899 4732.588899 4732.588899 ZT8-11 4321.325252500001 4321.325252500001 4321.325252500001 ZT12-15 4870.421684999999 4870.421684999999 4870.421684999999 ZT16-19 4448.844721 4448.844721 4448.844721 ZT20-23 3712.998646 3712.998646 3712.998646