Exercise 2: The following sample observations were randomly selected. X Y 5 13 3 15 6...
| Exercise 2: | The following sample observations were randomly selected. | |||||
| X | Y | |||||
| 5 | 13 | |||||
| 3 | 15 | |||||
| 6 | 7 | |||||
| 3 | 12 | |||||
| 4 | 13 | |||||
| 4 | 11 | |||||
| 6 | 9 | |||||
| 8 | 5 | |||||
| a. Insert the trendline equation. | ||||||
| b. Determine the coefficient of correlation and the coefficient of determination. | ||||||
Homework Answers
| x | y | xy | x2 | y2 | |
| 5 | 13 | 65 | 25 | 169 | |
| 3 | 15 | 45 | 9 | 225 | |
| 6 | 7 | 42 | 36 | 49 | |
| 3 | 12 | 36 | 9 | 144 | |
| 4 | 13 | 52 | 16 | 169 | |
| 4 | 11 | 44 | 16 | 121 | |
| 6 | 9 | 54 | 36 | 81 | |
| 8 | 5 | 40 | 64 | 25 | |
| 39 | 85 | 378 | 211 | 983 | Total |
| 4.875 | 10.625 | Average |
y = a + bx
n= total number of sample data point
=====================================================
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Exercise 2:
The following sample observations were randomly
selected.
X
Y
5
13
3
15
6...
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