Solved: Exercises 31 to 34 refer to the following setting. Many chess masters and chess

QUESTION:

Exercises 31 to 34 refer to the following setting. Many chess masters and chess advocates believe that chess play develops general intelligence, analytical skill, and the ability to concentrate. According to such beliefs, improved reading skills should result from study to improve chess-playing skills. To investigate this belief, researchers conducted a study. All of the subjects in the study participated in a comprehensive chess program, and their reading performances were measured before and after the program. The graphs and numerical summaries below provide information on the subjects pretest scores, posttest scores, and the difference (post pre) between these two scores. Descriptive Statistics: Pretest, Posttest, Post pre Variable N Mean Median StDev Min Max Q1 Q3 Pretest 53 57.70 58.00 17.84 23.00 99.00 44.50 70.50 Posttest 53 63.08 64.00 18.70 28.00 99.00 48.00 76.00 Post-pre 53 5.38 3.00 13.02 19.00 42.00 3.50 14.00 100 0 50 Pretest Posttest Post pre How well does it fit? (3.2) Discuss what s, r 2, and the residual plot tell you about this linear regression model.