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2.2 Data Presentation and Interpretation

2.2 Data Presentation and Interpretation

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Question 27

OCR Large Data Set 9 contains data for a random sample of 200 individuals aged 16 and over from the 2003–04 American National Health and Nutrition Examination Survey. The code #N/A is used when a value is unavailable.

a.

State the sampling unit.

[1]
b.

Explain why #N/A is preferable to entering 0 for an unavailable weight.

[1]
c.

Weight is unavailable for 4 individuals. Find the percentage of individuals for whom weight is available.

[1]
Markscheme

2.2 Data Presentation and Interpretation Questions

  1. A Level
  2. /Maths
  3. /2.2 Data Presentation and Interpretation

121 exam-style questions on OCR (MEI) A Level Maths 2.2 Data Presentation and Interpretation, covering 2.2.1 Types of data and standard diagrams, 2.2.2 Area in a histogram is proportional to frequency, 2.2.3 Cumulative frequency diagram, 2.2.4 Describe frequency distributions, 2.2.5 Samples and theoretical distributions, 2.2.6 Interpret a scatter diagram, 2.2.7 Distinct sections and outliers in scatter diagrams, 2.2.8 Correlation and causation, 2.2.9 Select or critique data presentation techniques, 2.2.10 Measures of central tendency, 2.2.11 Simple measures of spread, 2.2.12 Variance and standard deviation, 2.2.13 Outliers, 2.2.14 Cleaning data, and 2.2 Data Presentation and Interpretation. Each one has a worked solution and a mark scheme showing where the marks go.

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