Free CAS MAS-I (Modern Actuarial Statistics I) Diagnostic Quiz
Take this free 12-question MAS-I sample quiz to benchmark your readiness. You get an instant readiness score and a weak-topic breakdown, like a mini practice test, every question with a full solution. No signup to start, no credit card.
A Poisson GLM with a log link was fitted to model auto insurance claim counts. The deviance residual plot is shown below. Based on this plot, which issue is most clearly indicated?
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Correct Answer: B
Solution
Choice B is correct.
The residual plot shows a clear funnel (megaphone) pattern: residuals near fitted value 2 are tightly clustered within ±0.3, but by fitted value 10 they spread to ±2.5. This increasing spread is the hallmark of heteroscedasticity — the variance of the response is not constant but grows with the mean. For a Poisson GLM, this suggests overdispersion (the actual variance exceeds what the Poisson model assumes). A quasi-Poisson or negative binomial model would be more appropriate.
Yes. The MAS-I diagnostic is a free 12-question sample quiz with instant scoring. You can take it with no signup and no credit card. Creating a free account saves your result and unlocks a personalized weak-topic study plan.
How long is the MAS-I diagnostic quiz?
The diagnostic is 12 questions and takes about 5 to 10 minutes. You get instant feedback on each question, then a readiness score with a topic-by-topic breakdown at the end.
Does the MAS-I diagnostic predict whether I will pass?
It gives you a starting readiness estimate and shows your weakest topics. It is a benchmark to focus your studying, not a pass guarantee. The readiness score sharpens as you practice more of the free MAS-I question bank.
What is the difference between the diagnostic quiz and a full practice test?
The diagnostic is a short 12-question sample quiz that maps your strengths and weaknesses quickly. For full-length practice, FreeFellow has the entire MAS-I question bank free, plus timed mock exams in the Fellow tier.
About FreeFellow
FreeFellow is an AI-native exam prep platform for actuarial (SOA & CAS), CFA, CFP, CPA, CAIA, GARP FRM, IRS Enrolled Agent, IMA CMA, and FINRA / NASAA securities licensing candidates, built around modern AI as a core capability rather than as a bolt-on. Every lesson ships with AI-narrated audio. Every constructed-response item has a copy-to-AI prompt builder so candidates can paste their answer into their own ChatGPT or Claude for self-graded feedback. Fellow members get instant AI grading on essays against the official rubric (currently CFA Level III, expanding to other essay-bearing sections).
The 70% you need to pass (question bank, written solutions, lessons, formula sheet, mixed practice, readiness tracking) is free forever, with no trial period and no credit card. Become a Fellow ($59/quarter or $149/year per track) to unlock mock exams, flashcards with spaced repetition, performance analytics, AI essay grading, and a personalized study plan.