Devry University-Supply Chain Decision Tools week 2 homework

Homework

Complete the following problems from Chapter 4 in your textbook. The Homework Problems grading rubric is posted in Doc Sharing—refer to the Homework Problems Rubric document.

Chapter 4 Problems

• Problem 4.24 a, b, c, and d
• Problem 4.46 a, b, and c

•• 4.24

Mark Gershon, owner of a musical instrument distributorship, thinks that demand for guitars may be related to the number of television appearances by the popular group Maroon 5 during the previous month. Mark has collected the data shown in the following table:

• a)Graph these data to see whether a linear equation might describe the relationship between the group’s television shows and guitar sales.
• b)Use the least-squares regression method to derive a forecasting equation.
• c)What is your estimate for guitar sales if Maroon 5 performed on TV nine times last month?
• d)What are the correlation coefficient (r) and the coefficient of determination (r²) for this model, and what do they mean? 

• 4.46

Thirteen students entered the business program at Sante Fe College 2 years ago. The following table indicates what each student scored on the high school SAT math exam and their grade-point averages (GPAs) after students were in the Sante Fe program for 2 years:

• a)Is there a meaningful relationship between SAT math scores and grades?
• b)If a student scores a 350, what do you think his or her GPA will be?
• c)What about a student who scores 800?