condition mean min max ZT0-3 63.990878 63.990878 63.990878 ZT4-7 113.589865 113.589865 113.589865 ZT8-11 97.794995 97.794995 97.794995 ZT12-15 28.4198045 28.4198045 28.4198045 ZT16-19 97.5007705 97.5007705 97.5007705 ZT20-23 251.462222 251.462222 251.462222