condition mean min max ZT0-3 67.6977 67.6977 67.6977 ZT4-7 66.3962 66.3962 66.3962 ZT8-11 66.68675 66.68675 66.68675 ZT12-15 78.2045 78.2045 78.2045 ZT16-19 125.46780000000001 125.46780000000001 125.46780000000001 ZT20-23 86.85963333333333 86.85963333333333 86.85963333333333