condition mean min max ZT0-3 7.207755000000001 7.207755000000001 7.207755000000001 ZT4-7 4.792415 4.792415 4.792415 ZT8-11 2.491935 2.491935 2.491935 ZT12-15 3.051665 3.051665 3.051665 ZT16-19 10.131245 10.131245 10.131245 ZT20-23 7.110110000000001 7.110110000000001 7.110110000000001