In a survey of 106 college students, data were gathered on the number of piercings each student had and the number of classes they had skipped in the past 3 weeks. We want to determine whether there is evidence of an association between the number of body piercings and number of classes skipped. The data can be found in PiercingsSkipClass. 

a. State the null and alternative hypotheses. 

b. Use the Corr/Regression applet to find and report the correlation coefficient. 

c. Is the association between number of piercings and number of classes skipped in the past 3 weeks positive or negative? How do you know? 

d. What is the p-value for the simulation-based test for correlation? 

e. Calculate the standardized statistic. 

f. Is there strong evidence of an association between number of body piercings and number of classes skipped? 

g. What can you conclude about generalization and causation from your results?