condition mean min max ZT0-3 32.062749999999994 32.062749999999994 32.062749999999994 ZT4-7 29.09065 29.09065 29.09065 ZT8-11 27.3187 27.3187 27.3187 ZT12-15 25.01245 25.01245 25.01245 ZT16-19 31.43305 31.43305 31.43305 ZT20-23 29.9026 29.9026 29.9026