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9709/73

Mathematics 9709/73 — May/June 2018

Cambridge A-Level · Probability & Statistics 2 (S2) · worked solutions for every part, with the mark scheme

7
questions
50
marks
75
minutes

Topics The Poisson Distribution · Sampling and Estimation · Linear Combinations of Random Variables · Hypothesis Tests · Continuous Random Variables

Q1The Poisson DistributionFree sample

A random variable XX has the distribution B(75,0.03)\mathrm{B}(75, 0.03).

(i)

Use the Poisson approximation to the binomial distribution to calculate P(X<3)\mathrm{P}(X < 3).

3M
(ii)

Justify the use of the Poisson approximation.

1M

The rest of this paper

6 more questions
  • Q2Sampling and Estimation6M
  • Q3Sampling and Estimation5M
  • Q4The Poisson Distribution · Linear Combinations of Random Variables7M
  • Q5Hypothesis Tests8M
  • Q6Linear Combinations of Random Variables9M
  • Q7Continuous Random Variables11M
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