Mathematics 9709/63 — October/November 2014

Cambridge A-Level · Probability & Statistics 1 · worked solutions for every part, with the mark scheme

questions

marks

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Topics The Normal Distribution · Representation of Data · Discrete Random Variables · Permutations and Combinations · Probability

Q13MThe Normal DistributionFree sample

Packets of tea are labelled as containing $250\text{ g}$ . The actual weight of tea in a packet has a normal distribution with mean $260\text{ g}$ and standard deviation $\sigma\text{ g}$ . Any packet with a weight less than $250\text{ g}$ is classed as 'underweight'. Given that $1\%$ of packets of tea are underweight, find the value of $\sigma$ .

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6 more questions

Q2Representation of Data5M
Q3Discrete Random Variables5M
Q4Representation of Data8M
Q5The Normal Distribution9M
Q6Permutations and Combinations9M
Q7Probability · Discrete Random Variables11M

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