condition mean min max ZT0-3 167.701009 167.701009 167.701009 ZT4-7 281.193488 281.193488 281.193488 ZT8-11 422.591854 422.591854 422.591854 ZT12-15 258.132389 258.132389 258.132389 ZT16-19 193.7110005 193.7110005 193.7110005 ZT20-23 211.7018515 211.7018515 211.7018515