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Practical skills assessed in a written examination

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Question 35

A group of environmental science students investigated the relationship between water temperature and the dissolved oxygen concentration in a freshwater stream.

The table below shows the measurements taken at six different sampling locations:

LocationWater temperature (∘C^{\circ}\text{C}∘C)Dissolved oxygen concentration (mg/L\text{mg/L}mg/L)
A12.49.8
B14.210.2
C16.58.5
D18.17.4
E20.37.9
F22.06.1

Using the data in the table, calculate the Spearman's Rank Correlation Coefficient (rsr_srs​) for water temperature and dissolved oxygen concentration.

Use the formula:

rs=1−6∑d2n(n2−1) r_s = 1 - \frac{6 \sum d^2}{n(n^2 - 1)} rs​=1−n(n2−1)6∑d2​

Give your answer to three decimal places.

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Practical skills assessed in a written examination Questions

  1. A Level
  2. /Biology
  3. /Practical skills assessed in a written examination