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2 years ago

The correlation coefficient for two sets of numbers that are perfectly negatively correlated is

Mathematics

1 answer:

Neporo4naja [7]2 years ago

5 0

The correlation coefficient for two sets of numbers that are perfectly negatively correlated is -1.

<h3>What is negative correlation?</h3>

Correlation is a statistical measure used to measure the relationship that exists between two variables. Negative correlation is when two variables move in different direction. If one variable increases, the other variable decreases.

To learn more about negative correlation, please check: brainly.com/question/27246345

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Which polynomial is a perfect square trinomal x^2 -6x +9 b) x^2 -2x +4 c) x^2 +5x +10 d) x^2 +4x +16

cestrela7 [59]

I hope this helps you

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3 years ago

Which expression shows the result of applying the distributive property to −2(13x−15) ? 23x−25 −23x−25 23x+25 −23x+25

PIT_PIT [208]

−2(13x−15)
distribute by multiplication -2 to 13x and -15

-26x+30

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4 years ago

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Use a surface integral to ﬁnd the surface area of the portion of the sphere xUse a surface integral to ﬁnd the surface area of t

brilliants [131]

Parameterize this surface (call it $S$ ) by

$\vec r(u,v)=\cos u\sin v\,\vec\imath+\sin u\sin v\,\vec\jmath+\cos v\,\vec k$

with $0\le u\le2\pi$ and $0\le v\le\dfrac\pi4$ . The limits on $u$ should be obvious. We find the upper limit for $v$ by solving for $v$ where the sphere and cone intersect:

$\begin{cases}x^2+y^2+z^2=1\\z=\sqrt{x^2+y^2}\end{cases}\implies x^2+y^2=\dfrac12$

$\implies(\cos u\sin v)^2+(\sin u\sin v)^2=\dfrac12$

$\implies\sin^2v=\dfrac12$

$\implies\sin v=\dfrac1{\sqrt2}\implies v=\dfrac\pi4$

Take the normal vector to $S$ to be

$\vec r_u\times\vec r_v=-\cos u\sin^2v\,\vec\imath-\sin u\sin^2v\,\vec\jmath-\cos v\sin v\,\vec k$

(orientation does not matter here)

Then the area of $S$ is

$\displaystyle\iint_S\mathrm dA=\iint_S\|\vec r_u\times\vec r_v\|\,\mathrm du\,\mathrm dv$

$=\displaystyle\int_0^{\pi/4}\int_0^{2\pi}\sin v\,\mathrm du\,\mathrm dv$

$=\displaystyle2\pi\int_0^{\pi/4}\sin v\,\mathrm dv=\boxed{(2-\sqrt2)\pi}$

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3 years ago

One hose can fill a pool in 12 hours. another hose can fill the same pool in 8 h

just olya [345]

Answer: 4.8 hours

Explanation:

One hose can fill a pool in 12 hours.
The other house can fill the same pool in 8 hours.

If they fill the pool together,
$\text {Time Needed } = \cfrac{12 \times 8}{12 + 8} = 4.8 hours
$

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3 years ago

Help please due monday

alina1380 [7]

Answer:

I think it is<u> D,</u> but I am not sure.

Step-by-step explanation:

Have a nice day!

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3 years ago