cgh112
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Hi,
I have data that looks like this:


"As part of a research project on vertebrate sampling techniques, an ecologist left 24 camera traps of different sizes at random locations in a forest in central Africa. After 24 hours she checked to see if each trap had recorded any vertebrates or not. Her null hypothesis (H0) was that there is no association between trap size and whether the trap caught vertebrates."


I have attached a photo of the table of data.


And was wondering if I am correct in saying the test to use would be 2-way chi-squared.
According to my lecturer (whom I have to follow for the assignment), the chart to use to summarise it is a pie-chart. For two-way chi-square apparently you use 2 pie charts.
All I can think of for mine is the attached drawing of a pie chart, which has 3 pie charts. Could it be possible I have to do it the other way round; one pie chart for invertebrates present and one for no invertebrates present?

Thanks
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Hajra Momoniat
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Hopefully the document that is attached will help
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