Although high school grades and testing scores, such as SAT or ACT, can be used to predict first-year college grade-point average (GPA), many educators claim that a more important factor influencing GPAis the living conditions of students. In particular, it is claimed that the roommate of the student will have a great influence on his or her grades. To test this hypothesis, suppose we selected at random 200 students and classified each according to the following two attributes:
(a) Ranking of the student’s roommate on a scale from 1 to 5, with 1 denoting a person who was difficult to live with and discouraged scholarship, and 5 signifying a person who was congenial and encouraged scholarship.
(b) The student’s first-year GPA. Say this classification gives the following 5×4 contingency table:
Compute the chi-square statistic used to test the independence of the two attributes, and compare it with the critical value associated with α = 0.05.
Abnormal Psychology Notes January 23, 2017 CHAPTER 2 Historical View of Abnormal Behavior Shaman or medicine men treated mental disorders half a million years ago (Neolithic) - Evil spirits - Trephination o Ancient treatment where release evil spirits by drilling holes in the skull and it comes out of the head Demonology, Gods, and Magic Demon or...