Determine whether the following results appear to have statistical significance, and also determine whether the results have practical significance.

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

15

subjects using the program, the average increase in IQ score is

4

IQ points. There is a

39%

chance of getting such results if the program has no effect.

Question content area bottom

Part 1

Does the IQ-increasing software have statistical significance?

A.

Yes, the software is statistically significant because the results are likely to occur by chance.

B.

No, the software is not statistically significant because the results are unlikely to occur by chance.

C.

Yes,

the software is

statistically

significant because the results are

unlikely

to occur by chance.

D.

No,

the software is

notstatistically

significant because the results are

likely

to occur by chance.