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2.5 Data presentation and interpretation

2.5 Data presentation and interpretation

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Question 29

A coded variable $x\,$ has mean 3.2 and variance 1.44. The original variable is $t = 5 x + 20$ .

a.

Find the mean of $t$ .

[1]

b.

Find the variance of $t$ .

[2]

c.

Find the standard deviation of $t$ .

[1]

Markscheme

2.5 Data presentation and interpretation Questions

A Level
Maths
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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