Concept explainers
(a)
To make: a residual plot and describe how the line fits the data.
(a)
Answer to Problem 55E
Explanation of Solution
Calculation:
The below figure shows the residual plot for the given data:
The above figure shows a residual plot with an unstructured (random) scatter of points in a horizontal band centered at zero. Most of the residuals are between
Conclusion:
Thus, the residual plot is plotted.
(b)
To find: the point which has the largest residual
(b)
Answer to Problem 55E
The point
Explanation of Solution
Calculation:
The below table shows values of predicted Y and residuals
Percent return (X) | New adults (Y) | Predicted Y (Y) | Residuals(Y-Y) |
74 | 5 | 9.43656125 |
|
66 | 6 | 11.86874481 |
|
81 | 8 | 7.308400634 |
|
52 | 11 | 16.12506604 |
|
73 | 12 | 9.740584195 |
|
62 | 15 | 13.08483659 |
|
52 | 16 | 16.12506604 |
|
45 | 17 | 18.25322666 |
|
62 | 18 | 13.08483659 |
|
46 | 18 | 17.94920371 |
|
60 | 19 | 13.69288248 |
|
46 | 20 | 17.94920371 |
|
38 | 20 | 20.38138727 |
|
From the table,the point
Conclusion:
Therefore, the point
Chapter 3 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Essentials of Statistics, Books a la Carte Edition (5th Edition)
Introductory Statistics
Fundamentals of Statistics (5th Edition)
Introductory Statistics
Elementary Statistics: Picturing the World (6th Edition)
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