Concept explainers
a.
To construct: A
a.
Explanation of Solution
Given:
The data set is:
Brother | Sister |
71 | 69 |
68 | 64 |
66 | 65 |
67 | 63 |
70 | 65 |
71 | 62 |
70 | 65 |
73 | 64 |
72 | 66 |
65 | 59 |
66 | 62 |
Graph:
The figure could be constructed as:
Interpretation:
From the above plot, it is clear that there is a weak
b.
To find: The least square equation.
b.
Answer to Problem 26E
The least square equation is
Explanation of Solution
From Ti-83 calculator the output is:
Thus, the equation of the regression line is
c.
To find: The height of Tonya if it is given that Damien is 70 inches.
c.
Answer to Problem 26E
The height is 64.525 inches.
Explanation of Solution
The height of Tonya can be calculated as:
Thus, the required height is 64.525 inches.
d.
To explain: Whether the prediction is highly accurate or not.
d.
Explanation of Solution
Coefficient of determination using Ti-83 calculator can be calculated as:
Interpretation:
Since, the coefficient of determination is not so high. Thus, the model is not highly accurate.
Chapter 8 Solutions
The Practice of Statistics for AP - 4th Edition
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