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← All exams Exam P Probability
✓ I passed this exam. Everything below is from the inside.
My honest verdict
“The gatekeeper. Conceptually beautiful, computationally brutal under time pressure. Master the distributions until they're reflexes, then drill timed sets, the exam tests speed as much as understanding.”
How I’d study for P today
Three phases, roughly 300 hours total:
- Foundation (weeks 1 to 4). Watch Stat 110 or work through a manual chapter by chapter. Your goal is why, not speed, understand what a moment generating function is for before memorizing it.
- Volume (weeks 5 to 10). Switch entirely to problems. Every distribution’s mean, variance, and MGF should be automatic. Keep a wrong-answer journal: one line per miss.
- Simulation (final 3 weeks). Timed, full-length practice exams only, under real conditions. If you’re consistently finishing with 20+ minutes to spare and scoring above the pass line, register.
The traps
- Untimed comfort. Being able to solve everything untimed means nothing; P is a speed exam.
- Skipping calculus review. If double integrals over a region make you hesitate, fix that first. It’s the tax on every continuous-distribution question.
- Ignoring the official samples. They are free and they are the exam’s voice. Do all of them.
If money is tight
Stat 110 + TIA’s free course + official samples can genuinely carry you to a pass for $0 in study costs. The exam support program can cover the registration fee itself.
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