condition mean min max ZT0-3 16.259975 15.55415 16.9658 ZT4-7 9.383765 9.383765 9.383765 ZT8-11 5.33788 5.33788 5.33788 ZT12-15 0 0 0 ZT16-19 7.769245 7.769245 7.769245 ZT20-23 13.5674 13.5674 13.5674