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zvonat [6]
3 years ago
10

A regression equation is obtained for a collection of paired data. It is found that the total variation is 20.711 , the explaine

d variation is 18.592 , and the unexplained variation is 2.119 . Find the coefficient of determination.
Mathematics
1 answer:
galben [10]3 years ago
8 0

Answer:

0.898

Step-by-step explanation:

The formula for the Coefficient of determination = ratio of explained variation to Total variation

From the above question, we have the following values

Explained variation = 18.592

Total variation = 20.711

The coefficient of determination = 18.592 : 20.711

= 18.592/20.711

= 0.8976872194

Approximately ≈ 0.898

Therefore, the coefficient of determination is 0.898

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Answer:

The Brooks conjecture is true as the proportion of the area of a sector to the area of a circle is only dependent on the angle.

Step-by-step explanation:

The area of a sector for a radius r and an angle θ is given as

\Delta Sector=\dfrac{1}{2}r^2\theta

Whereas the area of a circle for a radius r is given as

\Delta Circle=\pi r^2

Now the ratio is given as

\dfrac{\Delta Sector}{\Delta Circle}=\dfrac{\dfrac{1}{2}r^2\theta}{\pi r^2}

Here as r is the radius of the circle and it is the same therefore the above ratio is simplified to

\dfrac{\Delta Sector}{\Delta Circle}=\dfrac{\theta}{2\pi }

Here as π is constant the only variable here is θ. Thus according to Brooks conjecture when the angles are equal, the proportion of area of each sector relative to the area of the given circle is also equal is true.

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3 years ago
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Answer:

6.27

Step-by-step explanation:

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The standard deviation = √(Σ(x - mean)²/ n)

The mean = (ΣX) /n

Using calculator to save computation time :

The standard deviation, s = 6.27 (2 decimal places)

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3 years ago
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Answer:

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Step-by-step explanation:

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A book has 6 chapters in it, each with the same number of pages. The book also has an introduction that is 8 pages long. The who
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Answer:

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Step-by-step explanation:

Assumed the question is how many pages are in each chapter.

<u>Let it be x:</u>

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