Multiple choice technology programming languages

Dataset x Rev1 Rev2 Rev3 Rev4 1 3 4 5 data y; set x; z=mean(?); run; Fill in the mean function call.

  1. mean(Rev1-Rev4)

  2. mean(of Rev:)

  3. mean(Rev1 Rev2 Rev3 Rev4)

  4. mean(of Rev1,Rev2,Rev3,Rev3)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The mean(of Rev:) syntax uses the SAS variable list shortcut 'of Rev:' which refers to all variables starting with 'Rev'. This is the most concise and correct way to calculate the mean of Rev1, Rev2, Rev3, and Rev4. Option A is incorrect because the range syntax with dash only works with numbered variables. Option C is incorrect because mean() requires the OF keyword when listing variables.

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