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
tatiyna
3 years ago
15

WILL GIVE BRAINLY PLEASE HELP!!!!!!!

Mathematics
1 answer:
marta [7]3 years ago
7 0

Answer:

r² = 0.5652  < 0.7 therefore, the correlation between the variables does not imply causation

Step-by-step explanation:

The data points are;

X,          Y

0.7,       1.11

21.9,     3.69

18,         4

16.7,      3.21

18,         3.7

13.8,      1.42

18,          4

13.8,      1.42

15.5,      3.92

16.7,       3.21

The correlation between the values is given by the relation

Y =   b·X + a

b = \dfrac{N\sum XY - \left (\sum X  \right )\left (\sum Y  \right )}{N\sum X^{2} - \left (\sum X  \right )^{2}}

a = \dfrac{\sum Y - b\sum X}{N}

Where;

N = 10

∑XY = 499.354

∑X = 153.1

∑Y = 29.68

∑Y² = 100.546

∑X² = 2631.01

(∑ X)² = 23439.6

(∑ Y)² = 880.902

From which we have;

b = \dfrac{10 \times 499.354 -153.1 \times 29.68}{10 \times 2631.01 - 23439.6} = 0.1566

a = \dfrac{29.68 - 0.1566 \times 153.1}{10} = 0.5704

r = \dfrac{N\sum XY - \left (\sum X  \right )\left (\sum Y  \right )}{\sqrt{\left [N\sum X^{2} - \left (\sum X  \right )^{2} \right ]\times \left [N\sum Y^{2} - \left (\sum Y  \right )^{2} \right ]}}

r = \dfrac{10 \times 499.354 -153.1 \times 29.68}{\sqrt{\left (10 \times 2631.01 - 23439.6  \right )\times \left (10 \times 100.546- 880.902\right )}  } = 0.7518

r² = 0.5652  which is less than 0.7 therefore, there is a weak relationship between the variables, and it does not imply causation.

You might be interested in
A​ self-tanning lotion advertises that a 4 ​-oz bottle will provide seven applications. Jen found a great deal on a 13 ​-oz bott
Alexxx [7]
4oz = 7 app
1oz = 1.75 app

13oz = 1.75 x 13
= 22.75 app

answer = the 13oz bottle should provide 22 application (as .75 does not count as one)
4 0
3 years ago
Pleaseee answer 1st correct answer gets brainliest
Ludmilka [50]

Answer:

4. No they do not form a proportion.  5. Yes they do form a proportion

Step-by-step explanation:

4 is less than 7 and 24 is less than 35 so they make proportions.

7.50 is more than 3 and 5 is more than 2 so they do not make proportions.

3 0
2 years ago
Hey whats 9x 27 and who likes memes i need a group
denpristay [2]
9x27 is 2187 hope this helps
5 0
3 years ago
Read 2 more answers
Multiply (6 z2 - 4 z + 1)(8 - 3 z ).
insens350 [35]
It would be d Answer if you simplified it
5 0
3 years ago
Read 2 more answers
The data shown are the final exam scores of 10 randomly selected math students and the number of hours they studied for the exam
jonny [76]

Answer: B) y=5.044x +56.11

4 0
3 years ago
Other questions:
  • Help with this problem
    8·1 answer
  • Kevin is 3 years older than Daniel. Two years ago, Kevin was 4 times as old as Daniel
    10·2 answers
  • Write 7,000+600+10+2 in standard form
    6·2 answers
  • A cable 20 feet long connects the top of a flagpole to a point on the ground that is 16 feet from the base of the pole. How tall
    13·1 answer
  • On this assignment, round all answers (when necessary) to exactly three decimal places. The numbers of construction workers for
    8·1 answer
  • 3 <br> = , which is 0.15 in decimal form.<br> 20 100
    7·1 answer
  • A realtor listed a house that was 45 yards by 10 yards..What is the total square footage of the house
    11·1 answer
  • Which statement is true?
    14·1 answer
  • Which expression is equivalent to 3a+9a+7b-b
    8·1 answer
  • For a test, please and thank you!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!