1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
choli [55]
3 years ago
14

PLEASEEEE HELP HOW DO YOU FIND THE COEFFICIENT OF A SCATTERPLOT, IM TIRED OF BRAINLY I LEGIT PAY FOR A SUBSCRIPTION TO GET FASTE

R AND APPROVED ANSWER'S YET I HAVE TO KEEP RE-ASKING MY QUESTIONS. THIS IS RIDICULOUS.
Mathematics
2 answers:
dlinn [17]3 years ago
5 0

Answer:

The correlation coefficient is determined by dividing the covariance by the product of the two variables' standard deviations. Standard deviation is a measure of the dispersion of data from its average. Covariance is a measure of how two variables change together.

Use the formula (zy)i = (yi – ȳ) / s y and calculate a standardized value for each yi. Add the products from the last step together. Divide the sum from the previous step by n – 1, where n is the total number of points in our set of paired data. The result of all of this is the correlation coefficient r

Verdich [7]3 years ago
3 0

Answer: There you go, hope it helps!

Step-by-step explanation:

Okay,not sure if this is what you're looking for but hope this helps :)

When the y variable tends to increase as the x variable increases, we say there is a positive correlation between the variables. When the y variable tends to decrease as the x variable increases, we say there is a negative correlation between the variables

You might be interested in
Find the perimeter of a rectangle whose dimensions are 15 inch times 8 inches
strojnjashka [21]
The perimeter of the rectangle is 120
5 0
3 years ago
Read 2 more answers
The difference between 15 and x​
ivann1987 [24]
Ones a number ones a letter lol
8 0
3 years ago
Read 2 more answers
Find the area of quadrilateral which length is 4 and breadth is 5 in which diagonal is 8 and height is 2
elena-14-01-66 [18.8K]
Can I see a photo? It be better to understand
3 0
3 years ago
A regression was run to determine if there is a relationship between the happiness index (y) and life expectancy in years of a g
Natasha2012 [34]

Answer:

(A) y=-0.762+0.119x

(B) If a country increases its life expectancy, the happiness index will increase.

(C) If the life expectancy is increased by 3.5 years in a certain country, the happiness index will increase by 0.4165.

(D) If the life expectancy is 67 years in a certain country, the happiness index will be 7.21.

Step-by-step explanation:

A regression analysis was performed to determine if there is a relationship between the happiness index (y) and life expectancy in years of a given country (x).

The output of the regression analysis are as follows:

a = -0.762

b = 0.119

r² = 0.8649

r = 0.93

(A)

The equation of the Least Squares Regression line of the form y = _ + _ x is:

y=-0.762+0.119x

(B)

The correction between the variables happiness index (y) and life expectancy in years of a given country (x) is, 0.93.

The correlation coefficient is positive. This implies that there is a positive relation between the two variables, i.e. as the value of life expectancy in years increases the happiness index also increases.

Thus, if a country increases its life expectancy, the happiness index will increase.

(C)

Compute the value of y for x = x + 3.5 as follows:

y=-0.762+0.119x

  =-0.762+0.119\times (x+3.5)\\\\=(-0.762+0.119x)+0.4165\\\\=y+0.4165

Thus, if the life expectancy is increased by 3.5 years in a certain country, the happiness index will increase by 0.4165.

(D)

Compute the value of y for x = 67 as follows:

y=-0.762+0.119x

  =-0.762+0.119\times 67\\\\=-0.762+7.973\\\\=7.211\\\\\approx 7.21

Thus, if the life expectancy is 67 years in a certain country, the happiness index will be 7.21.

6 0
4 years ago
The ratio of petunias to geraniums in the greenhouse was 15 to 2. The combined numbernof petunias and geraniums was 1020.
AnnZ [28]

Answer:

E. 120

Step-by-step explanation:

Let's say the number of total flowers is (15+2)x

That means the number of geraniums is 2x.

That also means that 1020 = 17x, which makes x = 60

Because 2x = geraniums and x = 60, the number of geraniums is 120

8 0
3 years ago
Other questions:
  • What is the correct solution to solving this equation?
    8·1 answer
  • Angle AOC and angle BOD are vertical angles. If m∠AOC = (4x + 40)° and m∠BOD = 120°, which equation could be used to solve for x
    5·1 answer
  • What is 92.583 rounded to the nearest tenth?
    12·1 answer
  • I need help with this...please some one..halp. <br><br><br> *15 points*
    14·1 answer
  • Solve the perimeter formula for an isosceles triangle, P = 2a + b for a.
    15·1 answer
  • If you awnser 5 stars and a thanks
    6·1 answer
  • Given mn, find the value of x.<br> +<br> (x-3)<br> (8x+3)
    13·1 answer
  • Plz Answer This Mathematics Question??? NEED HELP ASAP
    9·1 answer
  • A rectangular bird sanctuary is being created with one side along a straight riverbank. The remaining three sides are to be encl
    15·1 answer
  • For the problem do you get the same final answer if you add first as you do if you multiply first?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!