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2.5 Data presentation and interpretation

2.5 Data presentation and interpretation

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Question 15

A histogram has frequency densities 1.5, 3 and 0.8 over the intervals 0<x≤40<x\leq40<x≤4, 4<x≤10 4<x\leq10\,4<x≤10 and 10<x≤20 10<x\leq20\,10<x≤20 respectively.

a.

Find the total frequency.

[2]
b.

Estimate P(X>7)P(X>7)P(X>7) for a randomly selected observation.

[3]
Markscheme

2.5 Data presentation and interpretation Questions

  1. A Level
  2. /Maths
  3. /2.5 Data presentation and interpretation

278 exam-style questions on CCEA A Level Maths 2.5 Data presentation and interpretation, covering 2.5.1 Data presentation and interpretation, 2.5.2 Data presentation and interpretation, 2.5.3 Data presentation and interpretation, 2.5.4 Data presentation and interpretation, 2.5.5 Data presentation and interpretation, 2.5.6 Data presentation and interpretation, 2.5.7 Data presentation and interpretation, 2.5.8 Data presentation and interpretation, 2.5.9 Data presentation and interpretation, and 2.5 Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.

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