数学undergrad准备统计PhD: 定性微分方程 or 实验设计?

title says all...... thanks a lot for the help, folks.....ddl is coming for course selection this quarter

P.S.再问一下,这边本科honor real analysis(讲lebesgue integration,跟grad analysis 1st sequence差不多) 和 grad school predictive analysis(multivariate analysis) time class, 选择哪个好?