Find the coefficient of correlation between and X and Y if covariance between X and Y is 15 and the variance of X and Y are respectively 10 and 25

Answers

Answer 1

Answer:

0.95

Step-by-step explanation:

[tex]Correlation \ coefficient \ (r) = \dfrac{covaraince \ between \ X \ and \ Y }{SD_X \times SD_Y }[/tex]

[tex]Correlation \ coefficient \ (r) = \dfrac{15 }{10^{1/2} \times 25^{1/2} }[/tex]

[tex]Correlation \ coefficient \ (r) = \dfrac{15 }{3.162 \times 5 }[/tex]

[tex]Correlation \ coefficient \ (r) = \dfrac{15 }{15.81 }[/tex]

[tex]Correlation \ coefficient \ (r) \simeq 0.95[/tex]


Related Questions

Help!!!! What is the area of this figure?

Select from the drop-down menu to correctly complete the statement.

The area of the figure is
Choose...cm².

Answers

Answer:

153

Step-by-step explanation:

You need to find the area of the triangle first which is 63. The you want to find the area of the trapezoid which is 90. Then add them together.

A 4-cup bottle of soda costs $5.64. What is the price per pint?

Answers

Answer:

2.82

Step-by-step explanation:

A pint is two cups, and 5.64 divided by 2= 2.82

Please help me im very depressed and im struggling a lot on my math and i really need some answers


Which sequence shows the numbers in order from least to greatest?

Answers

Answer:

C

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

-2.45 times 10 squared is -245 while square root of 93 is 9.643650761 so 6.387 is the smallest then square root of 93 then -2.45 times 10 squared.

A shirt originally cost $24.99. It was on sale for $19.99. What was the percent decrease in the price of the shirt?

A.
5%

B.
10%

C.
20%

D.
25%

Answers

The percentage is shirt is 5%

24.99 x 0.20 = 5
24.99 - 5 = 19.99

the answer is C. 20%

Use the properties of logarithms
Rewrite the following in the form log(c).
5log(2)

Answers

Answer: [tex]5\log(2)=\log(2^5)[/tex]

Step-by-step explanation:

According to the properties of logarithms, we have

To rewrite : [tex]5\log (2)[/tex] in the form of log(c).

Therefore,

[tex]\leq 5\log(2)=\log(2^5)[/tex]   [[tex]\because\ n\log(m)=\log(m^n)[/tex]]

Hence, [tex]5\log(2)=\log(2^5)[/tex] .

_x + 7 = 10 its x over two
2 X =

Answers

Answer:

0

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Step-by-step explanation:

give brainliest or vanish

In a sale the price of a sofa is reduced by 70%. The price is £255 Work out the price before the sale

Answers

Answer:

850

Step-by-step explanation:

850*0.3=255

PLEASE HELP!! ILL GIVE BRAINLIEST

Answers

Answer:

Its SSS because we know that MN=HJ and MQ=HC

Step-by-step explanation:

2=4 in MN=HJ

5=10 in MQ= HC

Click on the measurements that is equal to 144 ounces

Answers

Answer:

its 9

Step-by-step explanation:

144 ounces to pounds is 9

Complete the function
table below for y= 4x + 5. (Look at the photo.)

Answers

Answer:

5, 25, 45

Step-by-step explanation:

okay so it goes like this, the number in the x colume X 4 + 5 so 0 X 4 = 0 + 5 = 5, 5 X 4 is 20 + 5 = 25 and 10 X 4 =40 + 5 = 45.

Kwamee created a coffee blend for his cafe by mixing Kona beans and Fuji beans. Kona beans cost $11 per pound and Fuji beans cost $7.50 per pound. He mixed a total of 23 pounds of coffee beans and spent a total of $197.

Write a system of equations that can be used to determine how many pounds of Kona and Fuji beans Kwamee bought.

Solve the system of equations to determine how many pounds of Kona and Fuji beans Kwamee bought.

*Show both the equations and the solution.

Answers

Let's use K for Kona and F for Fuji. The system of equations has to be a balanced system. For example, you can't mix the number of pounds of beans with the cost for each because pounds and dollars are different and you can only combine like terms...pounds with pounds and dollars with dollars. So let's start with the number of pounds. Since we don't know how much of each he bought we have the 2 unknowns, F and K, but we DO know that he bought 23 pounds total. So the first equation is
K + F = 23
Now let's see what we can do with the dollars. Again, we don't know how much he bought of each kind of coffee, but we do know that Kona beans cost $11 per pound and that Fuji beans cost $7.50 per pound, and we know that he spent a total of $197. So let's set that up:
11K + 7.50F = 197
Those are your 2 equations. It doesn't say you need to solve them, so you're done.

Can anyone simplify

6d - 4d

Answers

Answer:

(6 - 4) + (d^2) = 2d

Step-by-step explanation:

You subtract 6-4 and since the d's don't have their set value yet you add it to your answer.

Solve for x
....................

Answers

Answer

go to the website symbolab math solver

Step-by-step explanation:

Use Cymath it works really good

4
Select the correct answer from the drop-down menu.
A gardener uses 1/3 of a liter of water to water 2/7 of a garden.
Watering the entire garden at this rate will require
How many liters of water.

Answers

Answer:

1 1/6 liters of water

Browning Montana holds the US record for the greatest temperature drop in one day. On January 23, 1916, the temperature changed by an average of -4.17 degrees per hour. To the nearest degree, what was the total temperature change after 24 hours???

Answers

Answer:

100°

Step-by-step explanation:

Average temperature change per hour = - 4.17° per hour

Total temperature change after 24 hours

Average temperature change per hour * 24

(-4.17° * 24) = 100.08

Temperature change = 100° (nearest degree)

13 (04.07)
What is the end behavior of the function f(x) = 3x4 – x3 + 2x2 + 4x + 5? (1 point)
Up on the left, up on the right
Up on the left, down on the right
Down on the left, up on the right
Down on the left, down on the right

Answers

Step-by-step explanation:

Coefficient of 3x⁴ is positive (concave upwards)

Power of x⁴ is even (both ends go upwards)

Hence the answer is Up on the left, up on the right.

-5y + 31 = y – 11 plz give me the anser

Answers

-5y+31=y-11
-5y= -42 + y
-6y = -42
y = 7 :D

What is 10x-2(4x+5)+6

Answers

Answer:

2x - 4

Step-by-step explanation:

Expand the brackets.

10x - 2(4x+5) + 6 = 10x - 8x - 10 + 6

Evaluate like terms.

10x - 8x - 10 + 6 = 2x - 4

Answer:

Step-by-step explanation:

10x-2(4x+5)+6 foil

10x-8x-10+6 combine like terms

2x-4

If you need to find x

2x=4 divide by 2

x=2

PLEASE HELP 60 POINTS
The table represents the linear function f(x), and the equation represents the linear function g(x).

Compare the y-intercepts and slopes of the linear functions f(x) and g(x) and choose the answer that best describes them.


x f(x)
0 1
2 4
4 7

g(x) = 2x + 1
The slope of f(x) is less than the slope of g(x). The y-intercept of f(x) is equal to the y-intercept of g(x).
The slope of f(x) is greater than the slope of g(x). The y-intercept of f(x) is equal to the y-intercept of g(x).
The slope of f(x) is less than the slope of g(x). The y-intercept of f(x) is greater than the y-intercept of g(x).
The slope of f(x) is greater than the slope of g(x). The y-intercept of f(x) is greater than the y-intercept of g(x).

Answers

Answer: Its most likely C

Step-by-step explanation:

I think

Answer:

c

Step-by-step explanation:

c

Givens: <-->AD is the perpendicular bisector of segment BC AB = 7x+1 AC = 8x-6 BC = 3x + 9 Find: BD

Answers

Answer:

wheres the pic

Step-by-step explanation:

waht is this plz help ​

Answers

Answer:

The answer is 10 and 37 degrees.

Step-by-step explanation:

Triangle angles add up to 180.

I hope this helped and if it did I would appreciate it if you marked me Brainliest. thank you and have a nice day!

- ( x - 10 )² = -121 solve by using the square root property

Answers

Answer:

You would get 789BX

Step-by-step explanation:

Use a calculator

Answer:

x = 21, -1

Step-by-step explanation:

i used a math w a y

Find 12% of 1,046 ????????

Answers

12 percent = 12/100 = 0.12
1,046 * 0.12 = 125.52
Solution: 125.52

Best answer gets brainliest hurry ASAP

Answers

enter your answer in the box

Haiii how you doing so far are you having a good morning too ? ʕ •ᴥ•ʔ

Answers

Answer:

HI I AM BORED

Step-by-step explanation:


What are the steps to find the slope and y-intercept of the equation 16x - 4y = -32?

Answers

Answer:

slope = 4

y-intercept = 8

Step-by-step explanation:

First convert the equation into the form

y = mx + c

where m is the slope, and c is the y intercept

16x - 4y = -32

16x + 32 = 4y

4y = 16x + 32

y = 4x + 8

m = 4

c = 8

Answer:

Slope = 4

Step-by-step explanation:

16x - 4y = -32

-16x .        -16x

-4y = -32 - 16x

/-4 .      /-4

y = 8 + 4x

Cam’s Sports is offering 20% OFF a basketball that costs $20. The same basketball costs $14.99 at Hoops Haven. Which store offers the better price? What is the better price?

Answers

Answer: Hoops Haven

Step-by-step explanation:

5/6 x 2/2 multiply to find equivalent fractions

Answers

Answer:

5/6 = 1/3

Step-by-step explanation:

Answer:5/6 times 2/2 = 5/6

Step-by-step explanation:

Plz help plzzz this is due today just plz help me and I will give brainliest

Answers

Answer:

18(2+3)

1.375 liters

Step-by-step explanation:

GCF is 18.

18(2+3)

2.5-1.125 which is 1.375

Hope this helps Merry Christmas!

HELP PLS!!!!!!!!!!!!!!

Answers

Answer:

the question is not clear

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