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2.2 Data Presentation and Interpretation

2.2 Data Presentation and Interpretation

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Question 37

For 80 observations, the 25th percentile is 14, the median is 27 and the 75th percentile is 39.

a.

State the lower quartile and upper quartile.

[2]
b.

Calculate the lower and upper outlier boundaries using the 1.5×IQR1.5\times\mathrm{IQR}1.5×IQR rule.

[3]
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 A Level Maths 2.2 Data Presentation and Interpretation, covering 2.2.1 Tables and diagrams for single variable data, 2.2.2 Area in a histogram, 2.2.3 Scatter diagrams and regression lines, 2.2.4 Informal interpretation of correlation, 2.2.5 Correlation and causation, 2.2.6 Measures of average and spread, 2.2.7 Calculations of mean and standard deviation, 2.2.8 Outliers, 2.2.9 Selecting or critiquing data presentation, and 2.2.10 Cleaning data. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank