The benthic invertebrate data collected from a wetland national wildlife refuge provides the rough proportions of invertebrate species in a given vegetated area under normal conditions (see table below). As part of a restoration strategy, the island was sprayed with sediment to uplift the island in attempt to fight sea level rise. Researchers want to know if the benthic invertebrate community remains proportional to what was found in the community pre-restoration. They collect samples and record the proportion of invertebrates found in the treated area. Invertebrate Group Expected Proportion pre-restoration Observed Number post-restoration Capitellidae 0.2 0.3 Oligochaete 0.3 0.1 Isopod larvae 0.12 0.05 Diptera larvae 0.2 0.4 Gastropods 0.18 0.15 If the researcher wants to determine if the post-restoration benthic invertebrate proportions are similar to the proportions under normal conditions (pre-restoration) what analysis might be best for this? A.poisson analysis B.chi-squared goodness of fit C.binomial test D.chi-squared analysis of independence E.odds/risk ratio q: How would provied the null and alternative hypotheses for this study.
The benthic invertebrate data collected from a wetland national wildlife refuge provides the rough proportions of invertebrate species in a given vegetated area under normal conditions (see table below). As part of a restoration strategy, the island was sprayed with sediment to uplift the island in attempt to fight sea level rise. Researchers want to know if the benthic invertebrate community remains proportional to what was found in the community pre-restoration. They collect samples and record the proportion of invertebrates found in the treated area.
|
Invertebrate Group |
Expected Proportion |
Observed Number |
|
Capitellidae |
0.2 |
0.3 |
|
Oligochaete |
0.3 |
0.1 |
|
Isopod larvae |
0.12 |
0.05 |
|
Diptera larvae |
0.2 |
0.4 |
|
Gastropods |
0.18 |
0.15 |
If the researcher wants to determine if the post-restoration benthic invertebrate proportions are similar to the proportions under normal conditions (pre-restoration) what analysis might be best for this?
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