Question 1

What is NCEA AS 91267 about?

Accepted Answer

This standard asks you to solve real-world problems using probability methods like two-way tables, probability trees, and risk calculations. You need to show you understand probability ideas and can explain your working clearly, using appropriate diagrams or tables to communicate your answer.

Question 2

What do students need to do for AS 91267?

Accepted Answer

1. Select the right probability method (such as two-way tables, probability trees, or relative frequency) to match the problem 2. Apply that method correctly to solve the problem and get the right answer 3. Show knowledge of probability terms and concepts you're using 4. Communicate your solution using appropriate representations (diagrams, tables, or mathematical statements) 5. Explain your reasoning so it's clear how you got from the problem to your answer

Question 3

What's the difference between Achieved, Merit, and Excellence for AS 91267?

Accepted Answer

Achieved: You correctly select and use a probability method to solve a straightforward problem, showing you understand the concept, and communicate your working with appropriate representations. Merit: You connect different probability concepts or representations to solve a problem, show logical thinking through your steps, and link your answer back to the context of the problem using clear explanations. Excellence: You develop a strategy to solve a complex probability problem, identify which concepts are relevant in context, build a logical chain of reasoning, and reflect on your answer in context using correct mathematical language.

Question 4

What mistakes do students typically make in AS 91267?

Accepted Answer

1. Not showing clear working or method — examiners can only award marks for what they can see, and a correct answer without working shown gets very limited credit 2. Failing to relate the final answer back to the real-life or statistical context of the problem 3. Choosing the wrong probability method or making calculation errors because you haven't read the question carefully enough

Probability

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