9709/62 · Oct/Nov 2025
Probability & Statistics 2 · 50 marks · 6 questions
- Question 18 marks
Conditions for a Poisson model, and probabilities over 4 and 20 weeks with an approximation.
- Question 26 marks
Standard deviations of combinations of normal and Poisson variables.
- Question 38 marks
Standard deviation from a confidence interval, the Central Limit Theorem and repeated intervals.
- Question 47 marks
Binomial test for a proportion, and why a Poisson approximation does not suit.
- Question 59 marks
Find a constant in a probability density function, then use the median for a probability.
- Question 612 marks
Test for a normal mean, with Type I and Type II error probabilities.