condition mean min max ZT0-3 183.08974999999998 166.875 199.3045 ZT4-7 301.288 301.288 301.288 ZT8-11 427.411 427.411 427.411 ZT12-15 0 0 0 ZT16-19 197.91199999999998 197.91199999999998 197.91199999999998 ZT20-23 264.0275 264.0275 264.0275