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2.5 Data presentation and interpretation

2.5 Data presentation and interpretation

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Question 3

The five values 2,4,7,8,x 2,4,7,8,x\,2,4,7,8,x have a supplied mean of 6.

a.

Find xxx.

[2]
b.

Calculate the variance of the five values.

[2]
c.

State the effect on the variance if every value is doubled.

[1]
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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