condition mean min max ZT0-3 18.4984 18.4984 18.4984 ZT4-7 13.733 13.733 13.733 ZT8-11 14.753499999999999 14.753499999999999 14.753499999999999 ZT12-15 13.45445 13.45445 13.45445 ZT16-19 24.54365 24.54365 24.54365 ZT20-23 20.4574 20.4574 20.4574