Exam-style question
Try this first
A fixed number of independent trials each have two outcomes and constant probability of success. Which distribution model is appropriate?.
- A.a binomial model is appropriate
- B.2a
- C.1a^2
- D.1a
Model answer
What a good answer should say
- The correct answer is a binomial model is appropriate.
This answer is tied to the objective: N1 Understand and use simple discrete probability distributions, excluding calculation of mean and variance of discrete random variables; use the binomial distribution as a model and calculate probabilities using the binomial distribution..
Explanation
Why this works
Use the explanation to connect the worked answer back to N1 Understand and use simple discrete probability distributions, excluding calculation of mean and variance of discrete random variables; use the binomial distribution as a model and calculate probabilities using the binomial distribution..
calculator check uses Discrete and binomial distributions: identify the quantities, do the stated operation, and select a binomial model is appropriate because it matches the verified final answer.
Maths method check
- Topic focus: Statistics.
- Question style: practice.
- Reasoning demand: understanding.
- Check the operation, notation, units, and final answer form against the question before moving on.
Common mistake
No common mistake is linked to this question yet.