9709/62 · May/June 2023
Probability & Statistics 2 · 50 marks · 7 questions
- Question 13 marks
Confidence interval for a proportion.
- Question 25 marks
Poisson mean and variance, when Poisson approximates binomial, and a tail probability.
- Question 38 marks
Unbiased estimates from summary data, then a test of a mean at 1%.
- Question 410 marks
Poisson conditions, probabilities over different periods, and a Poisson total.
- Question 511 marks
Difference and weighted sum of normal variables.
- Question 65 marks
Type I error from a binomial test and a Type II error.
- Question 78 marks
Linear density function: constant, expectation and a limit from the median.