Home > Subjects > Mathematics > Level 3 - statistics and modelling > 3.6 Probability distributions (AS90646) > Key tips
- Subject: Mathematics
- AS: 90646
- Level: 3
- Credits: 4
- External
Statistics and modelling 3.6 Use probability distribution models to solve straightforward problems
Key tips
- Revise normal distribution in 2.6 Probability.
- Drawing an appropriate and accurately labelled graph will help your understanding of any problem you are attempting to solve.
- Understand the differences between binomial, Poisson, and normal distributions and when to use them.
- The symbol
(pi) does not mean 3.14 in this context. It stands for binomial probability. - Merit questions may involve solving problems from situations involving combined events.
- Merit questions may involve solving problems using the binomial and Poisson distributions.
- Excellence requires you to be familiar with the following approximations:
- binomial distribution approximated by the Poisson distribution
- binomial distribution approximated by the normal distribution
- Poisson distribution approximated by the normal distribution.
- The use of sigma notation (PDF 224KB) may be required, for example, in calculations or proofs.
- The use of appropriate technology is expected.
- Check out the I Can Do Sheet Level 3 Statistics from www.nzamt.org.nz for a list of essential skills for each achievement standard.
