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
Firlakuza [10]
2 years ago
10

The scatterplot that represents the monthly values of stock QRS has an r

Mathematics
1 answer:
cricket20 [7]2 years ago
4 0

Answer:

D

Step-by-step explanation:

The correlation coefficient, r value, measures the strength and direction of 2 variables in a scatterplot. It ranges from +1 to -1.

+1 means a perfect positive correlation

-1 means a perfect negative correlation

0 means there is no correlation

Also,

a value close to 0.7 would signify a strong relationship (whether positive or negative)

a value close to 0.5 indicates a moderate relationship

a value close to 0.3 indicates a weak relationship

Now, the question says the r value is 0.315

THis is POSITIVE

Also, this is a "weak" relationship

Thus, we can say:

It has weak correlation, or answer choice D

D is right.

You might be interested in
Simplify 25(14–27)+25÷16. a 28/5 b16/5 c 31/5 d 36/5
serg [7]

Answer:

-323.4375

Step-by-step explanation:

8 0
2 years ago
1/4 times the sum of a number and −3.2 is 1.8. What is the number?
joja [24]

Answer:

10.4

Step-by-step explanation:

Let the number be x

Sum of  x  and -3.2 : x + (-3.2) = x - 3.2

1/4 times the sum of a number and −3.2 = (1/4) * (x - 3.2)

\dfrac{1}{4}* \left( x - 3.2 \right) = 1.8\\\\\Multiply \ the \ whole \ equation \ by \ 4 \\\\4*\dfrac{1}{4} *(x - 3.2) = 1.8*4\\\\\\x - 3.2 = 7.2\\\\Add \  3.2 \ to \ both \ sides\\\\\\x = 7.2 + 3.2\\

x = 10.4

5 0
2 years ago
Evaluate 1/3 - 5/6<br><br> I NEED THIS ASAP!!!
MissTica

Answer:

-1/2

Step-by-step explanation:

2/6 - 5/6= -3/6

= -1/2

4 0
2 years ago
Read 2 more answers
A regional planner employed by a public university is studying the demographics of nine counties in the eastern region of an Atl
Brilliant_brown [7]

Answer:

Step-by-step explanation:

Hello!

Given the variables:

X₁: Median Age

X₂: Median Income

b) Considering it from a logical point of view, income changes with age, for example, the more experienced the worker is you would think he would get a better paying job than a younger worker who is just starting. Then the dependent variable will be the median income and the independent variable will be the median age.

a)  and c)

To see if there is a linear regression between the median income and median age you have to conduct a hypothesis test for the slope. If the slope is equal to zero, there is no linear regression between the two variables, if it is different to zero, there is a regression between the two of them:

H₀: β=0

H₁: β≠0

α: 0.05

t= \frac{b-\beta }{Sb} ~~t_{n-2}

The estimated regression equation for this regression ^Yi= 20.01 + 0.50X

The standard deviation for the slope is Sb= 0.11

t_{H_0}= \frac{0.50-0}{0.11} = 4.545

And the p-value for the test is 0.0022

The p-value is less than the level of significance I choose, so the decision is to reject the null hypothesis. You can conclude that there is a linear regression between these two variables.

The correlation coefficient between the median income and the median age is r= 0.87 ⇒ This means you could expect a positive and strong linear correlation between the two variables.

d)

The slope represents how much the variable Y is modified whenever the variable X increases one unit.

In this example: Is the modification of the population mean of the median income, when the median age increases one year.

5 0
3 years ago
One of your friends lives 225 km away. It took him 2.5 hours to travel to the cottage. At what speed did he travel?
Dahasolnce [82]
Speed = distance / time

given:
distance = 225 km and time = 2.5 hours

so
speed = 225 / 2.5 = 90 km per hour

Answer:
Speed = 90 km per hour
8 0
2 years ago
Other questions:
  • The ship Mark travels from Halo dock to Oregon dock in Liverpool. At the same time, a ship called Annie travels from Oregon dock
    5·1 answer
  • Determine the answer to 3+(-5) and explain the steps using the number line
    8·2 answers
  • 2x³+x²-15x-5 / (x+3)(x-2) express as partial fraction​
    5·1 answer
  • Miguel started an exercise program that has him swim 8 laps each day during the first week. Each week he adds 2 laps to his rout
    15·1 answer
  • Solve:<br> (-5) + (-18) =<br> A-13<br> B<br> --23<br> C С<br> 23<br> D<br> 13
    7·2 answers
  • Please help me and please
    11·1 answer
  • Can someone please help with my math :I !!
    10·1 answer
  • Slope of the line that contains (-8,2) , (7,-4)
    5·1 answer
  • HELP I REALLY REALLY NEED HELP
    5·2 answers
  • Change this to an improper fraction 3 1/8
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!