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2 Unit AS 2: Applied Mathematics

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Question 80

A random sample of 12 measurements has mean 15 and Sxx=132S_{xx}=132Sxx​=132.

a.

Calculate the descriptive variance of the 12 recorded measurements.

[1]
b.

Calculate the unbiased estimate of the population variance.

[1]
c.

Explain which value should be used to describe only the observed measurements and which should be used to estimate population variance.

[2]
Markscheme

2 Unit AS 2: Applied Mathematics Questions

  1. A Level
  2. /Maths
  3. /2 Unit AS 2: Applied Mathematics

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