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2 Statistics

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Question 136

The seven observations 5,7,9,11,13,15,x 5,7,9,11,13,15,x\,5,7,9,11,13,15,x have mean 12.

a.

Find xxx.

[2]
b.

Calculate the sample standard deviation of the seven observations.

[3]
Markscheme

2 Statistics Questions

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

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