Assignment:
Problem:
The following data were collected during a study of consumer buying patterns:
| Observation |
x |
y |
Observation |
x |
y |
| 1 |
18 |
77 |
8 |
21 |
80 |
| 2 |
22 |
84 |
9 |
10 |
75 |
| 3 |
45 |
79 |
10 |
12 |
75 |
| 4 |
37 |
83 |
11 |
18 |
90 |
| 5 |
49 |
96 |
12 |
25 |
91 |
| 6 |
42 |
91 |
13 |
34 |
95 |
| 7 |
33 |
82 |
|
|
|
a. Obtain a linear regression line for the data.
b. What percentage of the variation is explained by the regression line? (Do not round intermediate calculations. Round your answer to the nearest whole percent. Omit the "%" sign in your response.)
c. Use the equation determined in part b to predict the expected value of y for x = 42.