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2 Unit AS 2: Applied Mathematics

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Question 122

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

a.

Find the mean of ttt.

[1]
b.

Find the variance of ttt.

[2]
c.

Find the standard deviation of ttt.

[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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