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Serggg [28]
2 years ago
12

Rikki decided to collect data to determine if a runner's time and speed are correlated. She determined the data to have a correl

ation coefficient of −0. 5. What does this r value indicate? No correlation A strong, positive correlation A weak, positive correlation A negative correlation.
Mathematics
1 answer:
balandron [24]2 years ago
4 0

The value of r indicates the negative correlation.

<h2>Given </h2>

Rikki decided to collect data to determine if a runner's time and speed are correlated.

She determined the data to have a correlation coefficient of -0. 5.

<h3>What is the correlation coefficient?</h3>

The correlation coefficient is a statistical measure that calculates the strength of the relationship between the relative movements of the two variables.

She determined the data to have a correlation coefficient of -0. 5.

Here, the coefficient is negative which is -0.5.

This correlation coefficient indicates that there exists a weak negative correlation between the runner’s time and the speed.

This relation is negative because the correlation coefficient is negative.

Hence, The value of r indicates the negative correlation.

To know more about the Correlation coefficient click the link given below.

brainly.com/question/19043872

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Find out the what is the perimeter of the rectangle .

To prove

Now as shown in the figure.

Name the coordinates as.

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Thus

AB = DC

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Formula

Disatnce\ formula = \sqrt{(x_{2} - x_{1})^{2} +(y_{2} - y_{1})^{2}}

Now the points  A(−3, 4) and  B(7, 2)

AB = \sqrt{(7- (-3))^{2} +(2- 4)^{2}}

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AB = \sqrt{100+4}

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Thus

CD= 2\sqrt{26}\units

Now the points

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AD = \sqrt{1 + 25}

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Formula

Perimeter of rectangle = 2 (Length + Breadth)

Here

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Breadth = \sqrt{26}\ units  

Perimeter\ of\ rectangle = 2(2\sqrt{26} +\sqrt{26})

Perimeter\ of\ rectangle = 2(3\sqrt{26})

Perimeter\ of\ rectangle = 6\sqrt{26}

\sqrt{26} = 5.1 (Approx)

Perimeter\ of\ rectangle = 6\times 5.1

Perimeter of a rectangle = 30.6 units.

Therefore the perimeter of a rectangle is 30.6 units.

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Step-by-step explanation:

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