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Elenna [48]
4 years ago
14

The coefficient of determination: a. cannot be negative b. is the square root of the coefficient of correlation c. can be negati

ve or positive d. is the same as the coefficient of correlation
Mathematics
1 answer:
patriot [66]4 years ago
5 0

Answer:

Correct statement: (a) and (b).

Step-by-step explanation:

R-squared is a statistical quantity that measures, just how near the values are to the fitted regression line. It is also known as the coefficient of determination.

The coefficient of determination is the squared value of the correlation coefficient.

That is,

R^{2}=(r(X, Y))^{2}

The correlation coefficient between two variables is the measure of the strength and direction of the relationship between two variables.

Its values ranges from -1.00 to +1.00.

Although <em>r</em> can be negative but R² is always positive, since square of a negative number is also positive.

So the correct statements are:

a. cannot be negative

b. is the square root of the coefficient of correlation

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Acellus inverse variation
RUDIKE [14]

The current when the resistance is 10 ohms is 24 amps

<h3>What are variations?</h3>

Variations are simply data that change in values (i.e. not constant)

<h3>Types of variation</h3>

The types of variations are:

  • Direct variation
  • Inverse variation
  • Joint variation
  • Combine variation

From the complete question (see attachment), we have the following highlights

  • The variation is an inverse variation
  • When current (I) is 30 amps, the resistance (R) is 8 ohms

An inverse variation is represented as:

k = IR

Where k represents the constant of variation.

The above equation can be rewritten as:

I_1R_1 = I_2R_2

So, we have:

30 \times 8 = I_2R_2

240 = I_2R_2

When the resistance is 10 ohms, we have:

240 = I_2 \times 10

Divide both sides by 10

24 = I_2

Rewrite the above equation as:

I_2 = 24

Hence, the current when the resistance is 10 ohms is 24 amps

Read more about inverse variation at:

brainly.com/question/1327394

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3 years ago
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melomori [17]

27 well if you're asking that then

5 0
3 years ago
Find the missing length <br> . Leave your answers in simplest radical form
Iteru [2.4K]

We have the triangle 30° - 60° - 90°.

The lenght of the sides are in proportion: 1:2:\sqrt3\to a:2a:a\sqrt3.

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Answer:

x=\dfrac{10\sqrt3}{3}\\\\y=\dfrac{5\sqrt3}{3}

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