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Trava [24]
3 years ago
12

A botanist created a linear model to predict plant height from soil acidity (pH level) for a certain type of plant. The slope of

the model was 2.5 centimeters per pH level, the standard deviation of the sample of plant heights
was 4 centimeters, and the standard deviation of the soil acidities was 1 pH level. What is the value of the correlation coefficient?
A
0.015
(B) 0.10
c. .25
d. 0.625
E
1.60​
Mathematics
1 answer:
Igoryamba3 years ago
5 0

Answer:

The answer is D. 0.625

Step-by-step explanation:

2.5=r(4/1)

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Evaluate the radical.<br> (Look at the photo)<br> Enter your answer in the box.
faltersainse [42]

Answer:

3

Step-by-step explanation:

This is a cube root so think what times what times what is 27?

3 x 3 x 3 = 27 so the answer is 3

Same problem explained

https://www.mathsisfun.com/numbers/cube-root.html  < in detail.

Very helpful website check it out

(It's not a random download link or whatever, look at my profile- i dont do that, its completely safe and legit.)

3 0
3 years ago
Help please &amp; thank you
tatiyna
The equation would be y = 60x + 20
5 0
3 years ago
If p, q are zeroes of polynomial f(x) =2x^2-7x+3,find the value of p^2+q^2​
Elza [17]

Answer:

p^2 + q^2 = 22/9.

Step-by-step explanation:

For a quadratic function ax^2 + bx + c if the zeroes are A and B then

A + B = -b/a and AB =  c/a.

2x^2 - 7x + 3

Now p and q are the zeroes of the above function so

p + q =  7/3 and pq = 3/2.

Now p^2 + q^2 = (p + q)^2 - 2pq

= (7/3)^2 - 2* 3/2

=  49/9 - 3

= 49/4 -  27/9

= 22/9.

4 0
2 years ago
Help with this question plsssss
Finger [1]
64 cubic feet is the answer you’re lookin for!

8 0
3 years ago
I’m having a hard time with this. Is this a typo by the teacher or should I actually be looking for a size?
Lemur [1.5K]

Step-by-step explanation:

There are 12 games in the population.  You need to use a random number generator to choose 2 of these games.

RandomSample[{1,2,3,4,5,6,7,8,9,10,11,12},2]

Let's say the first sample you get is {1,5}.  That corresponds to game times of 8 minutes and 7 minutes.  The mean game time for that sample is 7.5 minutes.  So the first row in your table would be:

\left[\begin{array}{ccc}Sample&List\ of\ Game\ Times&Mean\ Game\ Time\\1&8,7&7.5\end{array}\right]

5 0
3 years ago
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