A medical journal used a questionnaire survey to determine whether a particular change in its format would increase its readership. Sixty-two percent of those who returned the questionnaire supported that change. On the basis of this outcome, the decision was made to introduce the new format.
The statement 'The percentage of surveyed readers who like the format change was almost the same as the percentage of the entire potential readership who would like the format change' would provide the best evidence that the journal's decision will have the desired effect.