Mathematics 9709/63 — May/June 2020

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

questions

marks

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

Q13MSampling and EstimationFree sample

A random sample of 100 values of a variable $X$ is taken. These values are summarised below.

n = 100 \quad \sum x = 1556 \quad \sum x^2 = 29\,004

Calculate unbiased estimates of the population mean and variance of $X$ .

The rest of this paper

6 more questions

Q2Linear Combinations of Random Variables5M
Q3The Poisson Distribution · Linear Combinations of Random Variables · Hypothesis Tests6M
Q4The Poisson Distribution · Linear Combinations of Random Variables8M
Q5Sampling and Estimation10M
Q6Continuous Random Variables9M
Q7Sampling and Estimation · Hypothesis Tests9M

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