The way we ask a question can affect the randomly divided 2400 respondents into
ID: 3325850 • Letter: T
Question
The way we ask a question can affect the randomly divided 2400 respondents into three groups. Each group answered the question, "Have you ever used inte The last group wrote their answers and the response was ar square test of homogeneity to determine if there are statistically significant differences among the proportions admitting (or not admitting) cocaine use. from a s A University of Wis study But researchers varied the way they asked the question. They one group by phone. They inte one group in a face-to-face private session. We conducted a chi- Here are the results. In this results table, the observed count appears above the expected count in each cell. Cocaine noCocaine yes Tota 632 602.7 1973 800 200 800 Face 602.7 1973 576 602.7 1973 800 Total 1808 592 2400 Chi-Square test: Chi-square 2 10619469 00049 the test of homogeneity, which percentages are most appropriate for this analysis? a 168/2400 200/2400 224 2400 b.168/800 200/800, 224/800 168/592 200/592 224 592Explanation / Answer
Result:
Answer: C. 168/592, 200/592, 224/592
proportion of cocaine users in the phone group is 168/592
proportion of cocaine users in the face to face group is 200/592
proportion of cocaine users in the anonymous group is 224/592.
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