condition mean min max ZT0-3 105.037225 86.58444999999999 123.49000000000001 ZT4-7 20.6766 20.6766 20.6766 ZT8-11 6.499575 6.499575 6.499575 ZT12-15 0 0 0 ZT16-19 11.46109 11.46109 11.46109 ZT20-23 17.31905 17.31905 17.31905