DP Biology (last assessment 2024)

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Question 18N.1.SL.TZ0.24

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.1.SL.TZ0.24
Level SL Paper 1 Time zone TZ0
Command term Determine Question number 24 Adapted from N/A
24.
[Maximum mark: 1]
18N.1.SL.TZ0.24

Limpets are molluscs with conical shells that cling tightly to rocks on seashores. In a study of two species of limpets found on rocks along the Oregon coast, 30 randomly placed quadrats were used to determine how often the two species occurred together. The table shows the data that were collected.

Which statistical method will determine whether these two species occur together by chance or by some kind of interaction?

A.  Chi-squared test

B.  t-test

C.  Standard deviation

D.  Means and ranges

[1]

Markscheme

A

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