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9709/62

Mathematics 9709/62 — May/June 2012

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

7
questions
50
marks
75
minutes

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

Q14MRepresentation of DataFree sample

The ages, xx years, of 150 cars are summarised by ∑x=645\sum x = 645 and ∑x2=8287.5\sum x^2 = 8287.5. Find ∑(x−xˉ)2\sum(x - \bar{x})^2, where xˉ\bar{x} denotes the mean of xx.

The rest of this paper

6 more questions
  • Q2Probability · Discrete Random Variables5M
  • Q3Discrete Random Variables6M
  • Q4Representation of Data6M
  • Q5Permutations and Combinations7M
  • Q6Probability · Permutations and Combinations9M
  • Q7The Normal Distribution · Discrete Random Variables · Probability13M
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