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3 years ago

What's does x equal?

Mathematics

2 answers:

GenaCL600 [577]3 years ago

8 0

7/6X=140
X=120
That's your answer.

Gnesinka [82]3 years ago

5 0

That is easy 175 or 2213

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abruzzese [7]

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3 years ago

For the accompanying data set, draw a scatter diagram of the data.x 2 6 6 7 9y 3 2 6 9 5B. by hand compute the correlation coeff

zhenek [66]

Answer:

Step-by-step explanation:

Hello!

Given the data corresponding the variables:

x 2 6 6 7 9

y 3 2 6 9 5

The Scatterplot is attached.

To compute the correlation coefficient you need several auxiliary calculations:

∑X= 30

∑X²= 206

∑Y= 25

∑Y²= 155

∑XY= 162

$r= \frac{sumXY-\frac{(sumX)(sumY)}{n} }{\sqrt{[sumX^2-\frac{(sumX)^2}{n} ][sumY^2-\frac{(sumY)^2}{n} ]} }$

$r= \frac{162-\frac{(30)*(25)}{5} }{\sqrt{[206-\frac{(30)^2}{5} ][155-\frac{(25)^2}{5} ]} }$

r= 0.429 ≅ 0.43

The critical value for r has n-2 degrees of freedom, let's say for example you have α:0.05

$r_{n-2;\alpha } = r_{3;0.05 } = 0.878$

For a two-tailed test.

Because the correlation coefficient is positive and the absolute value of the correlation coefficient, _0.43___, is not greater than the critical value for this data set,_0.878__, no linear relationship exists between x and y.

I hope it helps!

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The true answer here is B.

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3 years ago

Read 2 more answers