condition mean min max ZT0-3 6481.6 6481.6 6481.6 ZT4-7 7105.9 7105.9 7105.9 ZT8-11 7061.65 7061.65 7061.65 ZT12-15 7107.9 7107.9 7107.9 ZT16-19 6703.049999999999 6703.049999999999 6703.049999999999 ZT20-23 6648.95 6648.95 6648.95