He Is Also Interested in Knowing Whether High or Low

Essay

.He is also interested in knowing whether high or low test-anxious individuals' performance is different for the computerized version of the two tests compared to the paper-and-pencil version of the tests.Within each anxiety group,he randomly assigns participants to either the computer version or the paper version of the GRE tests.Participants then complete both the verbal and quantitative tests of the GRE in the test version they've been assigned (computer or paper).Thus,each participant has two scores,a Verbal score and a Quantitative score.
Assume the following results were observed for the mean Verbal scores (we'll ignore Quantitative scores): Based on these findings,the researcher claims that Test Version,computer vs.paper,does not affect individuals' average performance.What information is the researcher using to make this claim? Is this claim justified?