The Stanford University Board of Trustees on Tuesday set rates for tuition, room and board for the 2006-07 academic year that represent a combined 5.4 percent increase over the current year's rates for undergraduates. . . . . General graduate student tuition also increased to $32,994, or 5.75 percent. Also increasing 5.75 percent are tuition rates for graduate engineering students and law students, while School of Medicine tuition rates rose 4 percent. The Graduate School of Business is in the second year of a new tuition structure in which entering MBA students pay the same tuition rate during each of their two years of study. The tuition for the incoming class of MBA students will be $43,380. The tuition for second-year MBA students will be $41,340.