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2.2.3 Central tendency, variation and standard deviation

2.2.3 Central tendency, variation and standard deviation

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Question 5

The CO emissions of 24 cars have mean 0.25 g/km and standard deviation 0.06 g/km.

A 25th car, with a CO emission of 0.49 g/km, is added to the sample.

a.

Find the mean CO emission of the 25 cars.

[2]
b.

Find the standard deviation of the CO emissions of the 25 cars.

[3]
Markscheme

2.2.3 Central tendency, variation and standard deviation Questions

  1. A Level
  2. /Maths
  3. /2.2.3 Central tendency, variation and standard deviation

39 exam-style questions on AQA A Level Maths 2.2.3 Central tendency, variation and standard deviation. Each one has a worked solution and a mark scheme showing where the marks go.

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