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2 Statistics

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Question 207

Two samples each contain five observations. Sample A has mean 10 and Sxx=20S_{xx}=20Sxx​=20; sample B has mean 14 and Sxx=30S_{xx}=30Sxx​=30.

a.

Find the mean of the combined sample.

[1]
b.

Find SxxS_{xx}Sxx​ and the sample standard deviation for the combined sample.

[3]
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2 Statistics Questions

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

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