Analysis of twoway tablesdrinking behavior and class attendance
This activity offers students direct experience with the 4 steps involved in hypothesis testing for two categorical variables, as presented in a twoway table:
 State the appropriate null and alternative hypotheses, Ho and Ha.
 Obtain a random sample, collect relevant data, and check whether the data meet the conditions under which the test can be used. If the conditions are met, summarize the data by a test statistic.
 Find the pvalue of the test.
 Based on the pvalue, decide whether or not the results are significant and draw your conclusions in context.^{[1]}
Inference for two categorical variables
Use this activity for inclass collaborative group work.
Estimate for completion time: 45 minutes
Materials needed:
 4step hypothesis testing template (shown below) for each group (handout, in .odt file formatOpenOffice.org Writer)
 Analysis software (SPSS, PPSP, SAS, R, Minitab, Excel, Calc)
 Data^{[2]}:
Missed a class  Nonbinger  Occasional binger  Frequent binger 

No  4617  2047  1176 
Yes  446  915  1959 
(: reminder to add handout, in .odt file format )
Activity
Analysis of a twoway table In the Harvard School of Public Health 1999 College Alcohol Study, a random sample of students from 119 4year U.S. colleges were surveyed as to frequency of alcohol consumption and occurrence of typical alcohol related problems. In particular, students who drank alcohol in the past year were asked if they had missed a class due to drinking. Based on reported frequency of alcohol consumption, students were classified by level of binge drinking behavior.^{[3]}
Design and implement hypothesis test Form students into groups of 24 students. Each group will need access to a laptop with statistical software loaded and a copy of the handout. Have the students complete the handout as a group, which includes the following information. Identify the following:

Resources
The following resources were used for ideas and organization in the development of this activity:
 Dean, S., & Illowsky, B. (2009, February 18). Lab 2: ChiSquare Test for Independence. Retrieved from the Connexions Web site on 13 Oct 2010.
References
 ↑ Open Learning Initiative. Statistics. Retrieved from the Open Learning Initiative web site http://oli.web.cmu.edu/openlearning/forstudents/freecourses/statistics.
 ↑ Wechsler, Henry, Lee, Jae Eun, Kuo, Meichun, and Lee, Hang. "College Binge Drinking in the 1990s: A Continuing Problem," Journal of American College Health. 48 (2000), pp. 199210
 ↑ Wechsler, Henry, Lee, Jae Eun, Kuo, Meichun, and Lee, Hang. "College Binge Drinking in the 1990s: A Continuing Problem," Journal of American College Health. 48 (2000), pp. 199210