The NAEP report described in Exercise 33 compared science scores for students who had home Internet access to the scores of those who did not, as shown in the graph. They report that the differences are statistically significant.
a) Explain what statistically significant means in this context.
b) If their conclusion is incorrect, which type of error did the researchers commit?
c) Does this prove that using the Internet at home can improve a student s performance in science?
