Question 30
Children from school A completed a puzzle. Their times are summarised by the box plot.
a.[1]
State the time by which 75% had completed the puzzle.
b.[2]
Explain what the two crosses represent in context.
For school B, the minimum is 6 minutes, the quartiles are 12, 15 and 17 minutes, and the maximum is 22 minutes.
c.[3]
Determine whether school B has any outliers.
d.[3]
Draw the box plot for school B.
e.[3]
Compare the two distributions.
2.2 Data Presentation and Interpretation Questions
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.