condition mean min max ZT0-3 291.628 291.628 291.628 ZT4-7 256.3195 256.3195 256.3195 ZT8-11 276.63800000000003 276.63800000000003 276.63800000000003 ZT12-15 214.4955 214.4955 214.4955 ZT16-19 337.7985 337.7985 337.7985 ZT20-23 295.919 295.919 295.919