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2.2.2 Scatter diagrams and correlation

2.2.2 Scatter diagrams and correlation

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Question 52

A botanist is investigating the relationship between the moisture content of soil, MMM (measured as a percentage), and the final growth height of a specific seedling species, HHH (measured in cm). The data for 8 test plots are recorded in the table below.

PlotABCDEFGH
Moisture (MMM %)2512385530421850
Height (HHH cm)18.310.125.432.815.228.114.920.5
a.

Calculate Spearman's rank correlation coefficient for these data.

[4]
b.

Stating your hypotheses clearly, test at the 5% level of significance whether there is evidence of a positive correlation between soil moisture content and seedling growth height.

[3]
Markscheme

2.2.2 Scatter diagrams and correlation Questions

  1. A Level
  2. /Maths
  3. /2.2.2 Scatter diagrams and correlation

157 exam-style questions on AQA A Level Maths 2.2.2 Scatter diagrams and correlation. Each one has a worked solution and a mark scheme showing where the marks go.

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