list(N = 10, P = 2,
      group = c(1, 1, -1, -1, -1, 1, 1, 1, -1, -1),
   Y = structure(.Data = c(1.40, 1.65,
                        1.64, 1.57,
                           1.44, 1.58,
                           1.36, 1.68,
                           1.65, 1.69,
                           1.08, 1.31,
                           1.09, 1.43,
                           1.25, 1.44,
                           1.25, 1.39,
                           1.30, 1.52), .Dim = c(10, 2)),
                           sign = c(1, -1))