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2 Statistics

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Question 161

A variable X X\,X has mean 24 and standard deviation 5. A new variable is defined by Y=3X−7Y=3X-7Y=3X−7.

a.

Find the mean of YYY.

[2]
b.

Find the variance of YYY.

[2]
Markscheme

2 Statistics Questions

  1. A Level
  2. /Maths
  3. /2 Statistics

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