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2 Statistics

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Question 207

For all 348 Local Authorities, the official OCR workbook gives the regression line y=1.283x−1.452y=1.283x-1.452y=1.283x−1.452, where x x\,x and y y\,y are the 2001 and 2011 percentages working mainly at or from home.

a.

Estimate the 2011 percentage for a Local Authority with 2001 percentage 18%.

[2]
b.

Calculate the residual if its actual 2011 percentage is 24.8%.

[2]
c.

Interpret the sign of the residual.

[1]
d.

Give one reason not to use the line for x=40x=40x=40.

[1]
Markscheme

2 Statistics Questions

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

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