Does Surgical Implantation Affect Hummingbird Weight Loss?

Can you provide more context or information about your experiment and what you are trying to determine?In summary, The speaker is seeking help with analyzing data from an ecology experiment involving 8 hummingbirds and a surgical implant. They are trying to determine if the implant affects the birds' mass and are considering using an ANOVA with a covariate of day number. However, they are unsure how to proceed and are asking for additional ideas or suggestions.
  • #1
Seadragon
8
0
Hello,

I am faced with a perplexing challenge in analyzing my results for an ecology experiment. All help is immensely appreciated.

The situation:

I have 6-month longitudinal mass data for 8 hummingbirds. From eye-balling the data, time definitely has an effect: masses tend to decrease over time between certain intervals.

I am trying to discern whether a surgical implant has any effect on hummingbird mass. For each bird, the surgery was performed at a DIFFERENT TIME in the 6-month period.

So to recap:

Need to figure out if the implant (of negligible mass) affects hummingbird mass (makes them lose weight etc.). Operations done at different times throughout the year, and birds mass systematically decrease at certain intervals throughout the year.

Any ideas? Thanks so much for the help. I'm thinking ANOVA with covariate of day number... but I'm confused as to how to proceed.
 
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  • #2
chi-square test for Homogeneity of Population?
 
  • #3
salzahrah said:
chi-square test for Homogeneity of Population?

I'm confused as to why you would run that particular test.
 

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