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2.2 Data Presentation and Interpretation

2.2 Data Presentation and Interpretation

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Question 53

A regression model for predicting reaction time r r\,r milliseconds from sleep s s\,s hours is

r=310−12sr=310-12sr=310−12s.

a.

Estimate the reaction time when s=8s=8s=8.

[1]
b.

An observed reaction time at s=8s=8s=8 is 226 ms. Calculate and interpret the residual.

[2]
c.

Explain why the model should not be used for s=16s=16s=16.

[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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