## Lab Exercises - Provide insights into relationships of measures within a
complex data set

**Exercise 1:** What's up with Cichlid Eye Sizes?

Please use the data in CichlidEyeSizeCauses
which contains information on the size of the eyes, body size and a few
ecological variables.

cichlids =
read.table("http://caspar.bgsu.edu/~courses/stats/Labs/Datasets/CichlidEyeSizeCauses.csv",sep=",",header=T)

A description of the data file can be found here.
I am really interested in the size of the eye (with measures of its
diameter in cichlids[,9]). First make friends with the data. The, can you
please help me figure out whether size, lake, depth, sex, or feeding type
may explain variation in eye size?

- What can you tell me about independent and dependent variables?
- What can you tell me about the relationships between eye size and each
independent variable?
- What is the correlational structure among independent variables?
- What can you tell me about the determinants of eye size?
- How can we include feeding type?

last modified: 10/28/2017