Question 1.

Acknowledge the data source in your document: https://www.biointeractive.org/classroom-resources/origin-species-beak-finch by inserting the link in .Rmd file.

The source for all of the data used in this project can be found here: https://www.biointeractive.org/classroom-resources/origin-species-beak-finch

Question 2.

Identify each variable in the data set Finch_Data.csv as

a). Qualitative or quantitative

Qualitative:

Species, Sex

Quantitative:

Band,First.adult.year, Last.Year, Weight, Wing, Tarsus, Beak Length, Beak Depth, Beak Width

b). Continuous, discrete, or neither

Continuous:

Weight, Wing, Tarsus, Beak Length, Beak Depth, Beak Width

Discrete:

Band,First.adult.year, Last.Year

Neither:

Species, Sex

c). Nominal, ordinal, interval, or ratio

Nominal:

Species, Sex

Ordinal:

None

Interval:

Band,First.adult.year, Last.Year

Ratio:

Weight, Wing, Tarsus, Beak Length, Beak Depth, Beak Width

Question 3

A second set of data the Grants collected is various averages per year (Finch_By_Year_Data.csv). This data can be used to show changes in the finches over time.
a). Generate a graph of beak depth of two species: fortis and scandens from 1978 to 2012.

ggplot(data=Finch_By_Year_Data, aes(x = Year, y = Beak.depth, color=Species)) +
  geom_point() +
  ggtitle("Comparison of Beak Depth in Different Species \n of Finch from 1978 - 2012") +
  ylab("Beak Depth (mm)")

b). Does this graph represent time-series or cross-sectional data?

Time-Series Data

c). Is there a noticeable trend in the change of beak depth from 1978 to 2012 for the fortis species?

There seems to be an overall decrease in beak depth over the years.

d). Is there a noticeable trend in the change of beak depth from 1978 to 2012 for the scandens species?

The beak depth of the scandens species has been relatively unchanging over the years.