9709/52 · May/June 2022
Probability & Statistics 1 · 50 marks · 7 questions
- Question 13 marks
Use summary statistics with coding to find the number of values.
- Question 26 marks
Distribution of the sum of two rolls of a non-standard die, mean and variance.
- Question 37 marks
Back-to-back stem-and-leaf: median, IQR, box plots and a comparison.
- Question 47 marks
Normal probabilities and an unknown standard deviation.
- Question 58 marks
Binomial probability for a small sample, normal approximation for a large one.
- Question 610 marks
Arrangements with restrictions, selections and splitting into groups.
- Question 79 marks
Choosing without replacement, and a conditional probability.