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2.2 Data Presentation and Interpretation

2.2 Data Presentation and Interpretation

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Question 31

A cumulative-frequency table for 50 values is shown.

x≤x\leqx≤1020304050
Cumulative frequency417314450
a.

Find the frequency in 20<x≤3020<x\leq3020<x≤30.

[1]
b.

Identify the median class and the class containing the upper quartile.

[2]
c.

State one limitation of estimating quartiles from this grouped table.

[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 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.

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