Mathematics 9709/72 — May/June 2011

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

questions

marks

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

Q14MLinear Combinations of Random VariablesFree sample

The weights of bags of fuel have mean $3.2\text{ kg}$ and standard deviation $0.04\text{ kg}$ . The total weight of a random sample of three bags is denoted by $T\text{ kg}$ . Find the mean and standard deviation of $T$ .

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6 more questions

Q2Sampling and Estimation5M
Q3The Poisson Distribution7M
Q4Sampling and Estimation8M
Q5The Poisson Distribution · Linear Combinations of Random Variables · Hypothesis Tests9M
Q6Hypothesis Tests8M
Q7Continuous Random Variables9M

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