Expand on Exercise 9.19 to interpret the conclusion that the correlations were not significantly different.

Exercise 9.19

The correlation in the Katz et al. study between Score and SAT-V for the 17 subjects in the group that did read the passage was .68. This correlation is not significantly different from the correlation you computed in Exercise 9.15, although it is significantly different from 0.00. What does it mean to say that the two correlations are not significantly different from each other?

Exercise 9.15

In the study by Katz, et al., referred to previously, in which subjects answered questions about passages they had not read, the question arises as to whether there is a relationship between how the students performed on this test and how they had performed on the SAT-Verbal when they applied to college. Why is this a relevant question?