condition mean min max ZT0-3 4958.692759 4958.692759 4958.692759 ZT4-7 4834.066693500001 4834.066693500001 4834.066693500001 ZT8-11 4333.845777500001 4333.845777500001 4333.845777500001 ZT12-15 4473.5981625 4473.5981625 4473.5981625 ZT16-19 4882.593339 4882.593339 4882.593339 ZT20-23 4110.963857 4110.963857 4110.963857