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Mrac [35]
2 years ago
12

TRUE or FALSE: The square root of R2 (the coefficient of determination) is r, the correlation coefficient. (remember that square

roots are always positive)
Mathematics
1 answer:
Ipatiy [6.2K]2 years ago
7 0

The The square root of R² (the coefficient of determination) is not r, the correlation coefficient. Therefore, it's false.

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

It should be noted that the correlation coefficient is used to measure how string the relationship between two variables are.

The correlation formula tells us the linear relationship between the variables. R² is the square of the correlation coefficient.

Learn more about correlation on:

brainly.com/question/4219149

#SPJ1

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Plzzzz I NEED help with 9 and 10 plzzzzz
jeyben [28]

<u><em>Question 9:</em></u>

\frac{20*(5)}{50}                    Simplify what is in the parenthesis

\frac{100}{50}                        Multiply 20 to 5

2                                            Divide 50 to 100

<u><em>*(Answer)*=</em></u> 2  

<u><em>Question 10:</em></u>

5+(18) ÷ 6                Simplify what is in the parenthesis      

5+3                                         Divide 6 to 18

8                                              Add 5 to 3

<u><em>*(Answer)*=</em></u> 8

Hope this helps

User who answered: <u><em>BangtanBoyScouts</em></u>






4 0
4 years ago
Find the integral of √(x² +4) W.R.T x​
Allushta [10]

Answer:

\frac{x}{2} *\sqrt{x^{2} +4} +\frac{1}{2}*LN(|\frac{x+\sqrt{x^{2} +4} }{2}|) +C

Step-by-step explanation:

we will have to do a trig sub for this

use x=a*tanθ for sqrt(x^2 +a^2) where a=2

x=2tanθ, dx= 2 sec^2 (θ) dθ

this turns \int\limits {\sqrt{x^{2}+4 } } \, dx into integral(sqrt( [2tanθ]^2 +4) * 2sec^2 (θ) )dθ

the sqrt( [2tanθ]^2 +4) will condense into 2sec^2 (θ) after converting tan^2(θ) into sec^2(θ) -1

then it simplifies into integral(4*sec^3 (θ)) dθ

you will need to do integration by parts to work out the integral of sec^3(θ) but it will turn into (1/2)sec(θ)tan(θ) + (1/2) LN(|sec(θ)+tan(θ)|) +C

then you will need to rework your functions of θ back into functions of x

tanθ will resolve back into \frac{x}{2} (see substitutions) while secθ will resolve into \frac{\sqrt{x^{2} +4} }{2}

sec(θ)=\frac{\sqrt{x^{2} +4} }{2}  is from its ratio identity of hyp/adj where the hyp. is \sqrt{x^{2} +4}  and adj is 2 (see tan(θ) ratio)

after resolving back into functions of x, substitute ratios for trig functions:

= \frac{x}{2} *\sqrt{x^{2} +4} + \frac{1}{2}*LN(|\frac{x+\sqrt{x^{2} +4} }{2}|) +C

3 0
3 years ago
What is 15.60 to 11.70
Scrat [10]
I'm assuming you're subtracting. It would be 3.9. The second one would be 0.65.
8 0
4 years ago
Tennis player strikes a tennis ball from underneath with her racket. The ball is sent straight up with an initial velocity of 19
alekssr [168]

Answer:

18.42 m

Step-by-step explanation:

At that point, the ball will be static, with final velocity of 0.

The initial velocity is 19.

The acceleration due to gravity is -9.8 m/s^2.

We now have to use an equation of kinematics shown below:

v_f^2=v_0^2+2as

Where

v_f  is the final velocity

v_0 is the initial velocity

a is -9.8

s is the distance we are looking for

Lets substitute and find the answer:

v_f^2=v_0^2+2as\\0=(19)^2+2(-9.8)s\\-361=-19.6s\\s=18.42

7 0
4 years ago
W = XYZ for Z<br> Solve for Z plz need work
Anna007 [38]

Step-by-step explanation:

W/XY=XYZ /XY

W/XY=Z

Z=W/XY

3 0
3 years ago
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