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2.1 Sampling

2.1 Sampling

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Question 13

A file of patient ages contains -2, 18, 31, 31, 146 and #N/A.

a.

Identify three values or features requiring investigation.

[3]
b.

Explain why replacing every questionable value by the sample mean may distort the analysis.

[1]
Markscheme

2.1 Sampling Questions

  1. A Level
  2. /Maths
  3. /2.1 Sampling

36 exam-style questions on OCR (MEI) A Level Maths 2.1 Sampling, covering 2.1.1 Population and sample, 2.1.2 Samples to make informal inferences, 2.1.3 Random sampling, 2.1.4 Variety of sampling techniques, 2.1.5 Select or evaluate sampling techniques, and 2.1 Sampling. Each one has a worked solution and a mark scheme showing where the marks go.

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