Follow the 8 steps in regression analysis to answer the following problem. Show necessary solution.

1. Survey tests on leadership skills and on self-concept were administered to student-leaders. Both tests use a 10 - point Likert scale with 10 indicating the highest scores for each test. Scores for the student-leaders on the tests follow: Student Code A B C D E F G H I J Self-Concept 9.5 9.2 6.3 4.1 5.4 8.3 7.8 6.8 5.6 7.1 Leadership Skill 9.2 8.8 7.3 3.4 6.0 7.8 8.8 7.0 6.5 8.3 Predict the leadership skill of a student leader whose self-concept is 7.5. 2. A researcher wishes to see if there is a relationship between the number of calories a sandwich has and the sodium content of the sandwich. Several different types of sandwiches are used. The data follow. Calories 419 419 386 240 354 231 174 (x) Sodium (in mg) 495 645 581 990 1159 787 (y) 1202 Predict the sodium (in mg) content of the sandwich whose calories is 500