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2 Statistics

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Question 218

A variable X X\,X has mean 14 and variance 6.25. The coded variable is Y=X−83Y=\dfrac{X-8}{3}Y=3X−8​.

a.

Find the mean and standard deviation of YYY.

[3]
b.

A second variable Z Z\,Z has mean 2 and standard deviation 1.2. Compare the location and spread of Y Y\,Y and ZZZ.

[2]
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2 Statistics Questions

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

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