condition mean min max ZT0-3 76.542059 76.542059 76.542059 ZT4-7 84.279694 84.279694 84.279694 ZT8-11 75.851594 75.851594 75.851594 ZT12-15 90.40067149999999 90.40067149999999 90.40067149999999 ZT16-19 101.3602435 101.3602435 101.3602435 ZT20-23 78.0829655 78.0829655 78.0829655