Would I use a Bar or a Line graph for this question and data? A plant ecologist

Question

Would I use a Bar or a Line graph for this question and data?

A plant ecologist visited 5 different prairie locations in Oklahoma. Among the data he collected was species richness, the number of different plant species encountered.

Which is the dependent variable? site number or species richness?

is the site number a continuous or discrete variable?

Is species richness a continuous or discrete variable?

what generalizations can you make about the effect of treatment on species richness?

Site No. Description Species Richness 1 abondoned, no grazed 33 species 2 annually burned 67 species 3 lightly grazed 58 species 4 highly grazed 41 species 5 hay meadow 63 species

Explanation / Answer

1. In general, the independent variable is manipulated by the experimenter and its effects on the dependent variable are measured.

So , species richness is dependent variable here

2. Site number is a continous variable since the scale is continuous and not made up of discrete steps as site is a location.

3. species richness is a discrete variable since the possible scores are discrete points on the scale as species richness was the number of different plant species encountered.

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