A publication presents results of salary surveys (average salary) by rank of the faculty member (professor, associate, assistant, instructor) and by type of institution (public, private). (a) List the factors and the number of levels of each factor. (Select all that apply.) institution, with three levels institution, with two levels salary, with four levels rank, with three levels salary, with three levels rank, with four levels (b) How many cells are there in the data table?              cells

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