Statistics Study Guide 2026
Everything you need to pass the Statistics exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 Statistics Exam Format at a Glance
📚 Statistics Topics to Study (23)
✍️ Sample Statistics Questions & Answers
1. Which regression diagnostic plot is used to check the linearity and homoscedasticity assumptions?
Plotting residuals against fitted values reveals non-linear patterns and changing variance (heteroscedasticity).
2. What is the primary value of case study analysis in Statistics training?
This is fundamental to Statistics practice. Developing critical thinking by applying theory to realistic professional scenarios represents the professional standard for practical in the Statistics certification framework.
3. If a random variable X is normally distributed with mean 50 and SD 10, what is P(X < 60)?
X = 60 corresponds to z = (60−50)/10 = 1.0; the area below z = 1.0 is approximately 0.8413.
4. What distinguishes a discrete probability distribution from a continuous one?
Discrete distributions assign positive probability to each countable outcome, while continuous distributions use probability density.
5. In quota sampling, how does a researcher select participants?
Quota sampling sets target numbers for particular subgroups (e.g., 50 men, 50 women) and then selects individuals non-randomly until each quota is filled.
6. What is the complement rule in probability?
The complement of an event A contains all outcomes not in A, and their probabilities sum to 1.