Could mud wrestling be the cause of a rash contracted by University of Washington students in the spring of 1992? Two physicians at the University of Washington student health center wondered this when one male and six female students complained of rashes after participating in a mud-wrestling event.Questionnaires were sent to all students in the residence halls who participated in the event.The questionnaire asked about the appearance of a rash and about attendance at the mud-wrestling event.The results,by gender,are summarized in the following table. The SPSS output for the above table is given below.The output includes the cell counts,the expected cell counts,the chi-square statistic,and its degrees of freedom.Expected counts are printed below observed counts. Chi-square = 2.289 + 1.098 + 1.098 + 0.527 = 5.002 df = 1,P-value = 0.0253
Which cell contributes most to the chi-square statistic?
A)Men who developed a rash
B)Men who did not develop a rash
C)Women who developed a rash
D)Women who did not develop a rash

Question

Could mud wrestling be the cause of a rash contracted by University of Washington students in the spring of 1992? Two physicians at the University of Washington student health center wondered this when one male and six female students complained of rashes after participating in a mud-wrestling event.Questionnaires were sent to all students in the residence halls who participated in the event.The questionnaire asked about the appearance of a rash and about attendance at the mud-wrestling event.The results,by gender,are summarized in the following table.  The SPSS output for the above table is given below.The output includes the cell counts,the expected cell counts,the chi-square statistic,and its degrees of freedom.Expected counts are printed below observed counts.  Chi-square = 2.289 + 1.098 + 1.098 + 0.527 = 5.002 df = 1,P-value = 0.0253
Which cell contributes most to the chi-square statistic?
A)Men who developed a rash 
B)Men who did not develop a rash 
C)Women who developed a rash 
D)Women who did not develop a rash

Quizplus · Accepted Answer

The expected count for women who developed a rash is 2.75, but the observed count is 6. This large difference between the expected and observed counts indicates that this cell contributes the most to the chi-square statistic. Additionally, the p-value of 0.0253 suggests that the relationship between gender and rash development is statistically significant. Therefore, it is likely that the mud-wrestling event was the cause of the rash contracted by these University of Washington students.

Could Mud Wrestling Be the Cause of a Rash Contracted