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2.2 Data presentation and interpretation

2.2 Data presentation and interpretation

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Question 14

For 200 observations, a cumulative-frequency curve gives approximately Q1=24Q_1=24Q1​=24, median =39 and Q3=61Q_3=61Q3​=61.

a.

State the cumulative frequencies used to read these three values.

[3]
b.

Calculate the IQR and the two 1.5×IQR1.5\times\mathrm{IQR}1.5×IQR outlier fences.

[3]
c.

Explain why values read from the curve are estimates.

[1]
Markscheme

2.2 Data presentation and interpretation Questions

  1. A Level
  2. /Maths
  3. /2.2 Data presentation and interpretation

105 exam-style questions on WJEC A Level Maths 2.2 Data presentation and interpretation, covering 2.2.1 Data presentation and interpretation, 2.2.2 Data presentation and interpretation, 2.2.3 Data presentation and interpretation, 2.2.4 Data presentation and interpretation, 2.2.5 Data presentation and interpretation, 2.2.6 Data presentation and interpretation, 2.2.7 Data presentation and interpretation, 2.2.8 Data presentation and interpretation, 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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