A data frame with 16 observations on the following 5 variables.
Blocksa factor with levels 1 2 3 4 5 6 7 8
Aa factor with levels -1 1
Ba factor with levels -1 1
Ca factor with levels -1 1
Da factor with levels -1 1
Ea factor with levels -1 1
Fa factor with levels -1 1
Ga factor with levels -1 1
Ha factor with levels -1 1
weighta numeric vector containing the response