Is there a correct way of comparing two different scales (for example; data which comes from a 4 option question and data which comes from a 7 option question) given that both datasets have the same range (for example; both the 4 option and 7 option question represent a numerical scale from 0 to 100%). The easiest option would just be to convert each dataset into the numerical representation on the scale of 0-100. I know this isn't exactly preferable but is it valid?

Kind regards

  • Are you comparing questions? Or answers to the questions? – William Chiu Jan 10 '16 at 3:20
  • Answers to questions, thanks – intex Jan 11 '16 at 2:01

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