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:
|
DEMAND FOR GUITARS |
3 |
6 |
7 |
5 |
10 |
7 |
|
MAROON 5 TV APPEARANCES |
3 |
4 |
7 |
6 |
8 |
5 |
- 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:
|
STUDENT |
A |
B |
C |
D |
E |
F |
G |
|
SAT SCORE |
421 |
377 |
585 |
690 |
608 |
390 |
415 |
|
GPA |
2.90 |
2.93 |
3.00 |
3.45 |
3.66 |
2.88 |
2.15 |
|
STUDENT |
H |
I |
J |
K |
L |
M |
|
|
SAT SCORE |
481 |
729 |
501 |
613 |
709 |
366 |
|
|
GPA |
2.53 |
3.22 |
1.99 |
2.75 |
3.90 |
1.60 |
|
- 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?
