Slovic, Monahan, and MacGregor (2000) have studied how the framing of statistics affects behavior. They took two different framings and presented them to two groups of clinicians.
Frame 1: Patients similar to Mr. Jones are estimated to have a 20% chance of committing an act of violence.
Frame 2: 20 out of 100 patients similar to Mr. Jones are estimated to commit an act of violence.
While both frames have essentially the same meaning, double the amount of clinicians refused to discharge the patient after reading frame 2.