A school psychologist wants to test the effectiveness of a new method of teaching Art. She recruits 600 second-grade students an
d randomly divides them into two groups. Group 1 is taught by means of the new method, while Group 2 is taught via traditional methods. The same teacher is assigned to teach both groups. At the end of the year, an achievement test is administered and the results of the two groups compared. What is the response variable in this experiment? a. The students’ ability in Art
b. The score of Group 1 on the achievement test
c. The score on the achievement test.
d. The score of Group 2 on the achievement test
The descriminant is b^2-4ac so for 26 it would be -5^2 - 4 (1) (7). The quadratic formula is -B plus or minus the square root of b squared minus 4ac over 2a