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2.2 L: Data presentation and interpretation

2.2 L: Data presentation and interpretation

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Question 33

The CO emission x x\,x g/km of each of 50 cars is recorded. For these cars,

∑x=12.5\sum x = 12.5∑x=12.5 and ∑x2=3.205\sum x^2 = 3.205∑x2=3.205

Calculate the mean and the standard deviation of these CO emissions.

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Markscheme

2.2 L: Data presentation and interpretation Questions

  1. A Level
  2. /Maths
  3. /2.2 L: Data presentation and interpretation

244 exam-style questions on AQA A Level Maths 2.2 L: Data presentation and interpretation, covering 2.2.1 Single-variable data diagrams, 2.2.2 Scatter diagrams and correlation, 2.2.3 Central tendency, variation and standard deviation, 2.2.4 Outliers and cleaning data, and 2.2 L: Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.

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