condition mean min max ZT0-3 549.0999999999999 549.0999999999999 549.0999999999999 ZT4-7 785.3 785.3 785.3 ZT8-11 715.65 715.65 715.65 ZT12-15 1216.65 1216.65 1216.65 ZT16-19 1001.3 1001.3 1001.3 ZT20-23 602.1 602.1 602.1