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Citrus2011 [14]
2 years ago
6

28)A regression equation is obtained for a collection of paired data. It is found that the total variation is 24.488, the explai

ned variation is 15.405, and the unexplained variation is 9.083. Find the coefficient of determination.
Mathematics
1 answer:
Doss [256]2 years ago
7 0

Answer: The coefficient of determination = 0.6291

Step-by-step explanation:

Given: Total variation is 24.488, the explained variation is 15.405, and the unexplained variation is 9.083.

The coefficient of determination is computed as:

\text{ coefficient of determination} =\frac{\text{explained variation }}{\text{total variation}}

Substituting given values, we get

\text{coefficient of determination} =\frac{15.405}{24.488}

=0.6291

Therefore, the coefficient of determination = 0.6291

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<h3>Answer:</h3>

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<h3>Explanation:</h3>

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B. The second equation is -1/2 times the first, so these describe the same line. The system has an <em>infinite number of solutions</em>.

C. The solution is (-4, -2)

D. The solution is (4, -2)

E. The second equation is 2 times the first, so these describe the same line. The system has an <em>infinite number of solutions</em>.

_____

A system of equations will have "no solution" when it describes parallel lines—lines that do not intersect. In standard form, such equations are recognizable by their different constants. For example,

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We could multiply one of these by -2 and the system would still be "inconsistent"—having no solution.

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Rudiy27

Answer:

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Step-by-step explanation:

It's easy

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