CAPE Applied Mathematics Unit 1 · 2011 · Paper 2 · Question 5(e)
Use your regression line to estimate the actual age of a person whose age was predicted as 45 years.
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Practise this questionOther parts of this question
- 5(a)On the answer sheet provided, draw a scatter diagram of the data in the table.[4 marks]
- 5(b)(i)Calculate x̄, the mean of x.[1 mark]
- 5(b)(ii)Calculate ȳ, the mean of y.[1 mark]
- 5(b)(iii)Plot the point (x̄, ȳ) on the scatter diagram.[2 marks]
- 5(c)Calculate the equation of the regression line of y on x and draw this line on the scatter diagram.[7 marks]
- 5(d)Calculate the product-moment correlation coefficient r, and interpret the value obtained relative to the scatter diagram.[5 marks]
- 5(f)Comment on the reliability of the value obtained in Part (e).[2 marks]
More practice: the rest of this paper · more Correlation and Linear Regression - Bivariate Data questions · all CAPE Applied Mathematics Unit 1 past papers