Most people have IQ scores between 70 and 130. For approximately $39.99, you can purchase a PC or Mac program from HighIQPro that is claimed to increase your IQ score by 10 to 20 points. The program claims to be "the only proven IQ increasing software in the brain training market," but researchers could find no substantial data supporting that claim, so suppose that in a study of 14 subjects using the program, the average increase in IQ score is 12 IQ points. There is a 2% chance of getting such results if the program has no effect.

Does the IQ-increasing software have statistical significance?