Take-Home Component of the Final

• You are to work alone on this. Consult no one, although you may ask me logistical questions.
• In the following you will be expected to analyze a small data set in several different ways. The data set concerns cicadas and the wasps that prey on them.
• You will be asked to sign that you carried out the analysis entirely on your own.
• The results will be incorporated into your final exam, and constitute 25% of your exam. It is due with your final.

The data for your take home portion is found here: http://www.nku.edu/~longa/classes/sta205/resources/STA205finalData.xls

1. For the variable "wasp mass", interpret the histogram on a single page.

2. Use the appropriate statistical tests to examine the following. For each question, put your answer on one single page:
   1. Are cicada species and location independent? Is a chi-square test appropriate? (for the chi-square you will need to use "tables, contingency, with data" in Statcrunch).

   2. Is there a difference in mean mass between the species of cicadas? If so, which differences are significant?

   3. Is there a linear relationship between the RWL (right wing length) of wasps and the RWL of cicadas? Graph the best fitting regression line.