Thanks for the reply and question, Steve! I work on a Customer Satisfaction team which reports/analyzes survey results for a major bank. All of our reports contain Top2 Box, and Bottom4 Box, scores for survey questions using the 10 pt Likert scale. A Top 2 Box score is a proportion and calculated as follows: (the count of responses to a particular survey question of a 9 or 10) divided by (the count of all responses to the same survey question). For instance, let's say we have test and control based upon an IVR option which results in a group of customers selecting YES or NO to some question. And let's say we survey these customers, but we are only concerned with one of the survey questions, Q9, which is as follows: "Would you recommend our Company to a friend or colleague? Please use a scale of 1 to 10, where 1 is 'Definitely Not' and 10 is 'Definitely'" And then let's say we have the following data from the survey: GROUP Q9 RESPONSE COUNT Q9 RESPONSE OF 9 OR 10 COUNT Q9 TOP 2 BOX N 117 61 52% Y 145 81 56% What is the best way using SAS for me to determine if the difference between the Q9 Top 2 Box scores for the two groups in the table, above, are significant? Again, thank you very much! John
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