In a two-way classified data with usual notations, the null hypothesis for testing block effects is written as:

If the incidence matrix N of a block design is given by a 4 × 4 matrix where all diagonal entries are 0 and all off-diagonal entries are 1 (or vice versa, forming a symmetric structure), which of the following properties is true for a design with the given matrix N = [[1, 1, 1, 0], [1, 1, 0, 1], [1, 0, 1, 1], [0, 1, 1, 1]]?

Consider the following block design where the columns represent blocks and the letters represent treatments: A C A B A B E B D C D D C F E E F F G G G Which of the following statements is FALSE regarding this design?