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2 Unit AS 2: Applied Mathematics

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Question 138

A variable x x\,x has mean 4 and standard deviation 1.5. A new variable is defined by y=2x+5y=2x+5y=2x+5.

a.

Find the mean of yyy.

[1]
b.

Find the standard deviation of yyy.

[1]
c.

Explain why adding 5 does not change the standard deviation.

[1]
Markscheme

2 Unit AS 2: Applied Mathematics Questions

  1. A Level
  2. /Maths
  3. /2 Unit AS 2: Applied Mathematics

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