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Y_Kistochka [10]
3 years ago
8

What is the purpose of testing whether β1 = 0? The purpose of testing whether β1 = 0 is to determine whether or not the mean of

the x values is equal to the mean of the y values. The purpose of testing whether β1 = 0 is to determine whether or not the regression line provides a good fit for the data. The purpose of testing whether β1 = 0 is to determine whether or not there is a significant relationship between x and y. The purpose of testing whether β1 = 0 is to determine whether or not there is a cause-and-effect relationship between x and y.
Mathematics
1 answer:
Monica [59]3 years ago
8 0

Answer:

The purpose of testing whether β1 = 0 is to determine whether or not there is a significant relationship between x and y

Step-by-step explanation:

  • The purpose of testing whether β1 = 0 is to determine whether or not the mean of the x values is equal to the mean of the y values.

No, since we are not interested if the mean for the two variables x and y are equal, we want to know if we have relationship between the two variables.

  • The purpose of testing whether β1 = 0 is to determine whether or not the regression line provides a good fit for the data

No, if we want to test if the regression line provides a good fit for the data we need to use a Chi square test or other type of test.

  • The purpose of testing whether β1 = 0 is to determine whether or not there is a significant relationship between x and y

Yes, the idea when we have this system of hypothesis:

Null hypothesis: \beta_1 =0

Alternative hypothesis: \beta_1 \neq 0

Is see if we have a significant relationship between x and y, that means that the slope is not equal to 0.

  • The purpose of testing whether β1 = 0 is to determine whether or not there is a cause-and-effect relationship between x and y.

No, when we conduct a regression we never can conclude that we have a cause-relation effect, that's not the goal when we conduct this, the idea is check if we have a type of relationship that can be linear, quadratic or other type of relationship betwen some variables.

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Vera_Pavlovna [14]

C

Step-by-step explanation:

This has a U like shape so it a parabola.

Parabola correlate with quadratic functions

y =  {ax}^{2}  + bx + c

Since it Going down, the answer is C -x^2.

3 0
2 years ago
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solong [7]

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Step-by-step explanation:

3 0
2 years ago
What is the common ratio of the geometric sequence: -1/12.-1/2,-3,18,...
Minchanka [31]
\frac{1}{6} : Common ratio

Check:
=-\frac{1}{12} ÷ \frac{1}{6}
=-\frac{1}{12} × 6
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8 0
2 years ago
Sarah had three times as many quarters as nickels. She had $3.20 in all. How many quarters did she have?
marin [14]

She have 12 quarters

<h3>what is unitary method?</h3>

It is a method where we find the value of a single unit from the value of multiple units and the value of multiple units from the value of a single unit.

There are two situation in Unitary method:

There are 5 ice-creams. 5 ice-creams cost $125.

Step 1: Let’s find the cost of 1 ice cream. In order to do that, divide the total cost of ice-creams by the total number of ice-creams. The cost of 1 ice-cream = Total cost of ice-creams/Total number of ice-creams = 125/5 = 25. Therefore, the cost of 1 ice cream is $25.

Step 2: To find the cost of 3 ice-creams, multiply the cost of 1 ice cream by the number of ice-creams. The cost of 3 ice-creams is cost of 1 ice-cream × number of ice-creams = 25 × 3 = $75. Finally, we have the cost of 3 ice-creams i.e. $75.

Given:

If she had 12 quarters, then

12 * .25 = $3 ( quarters)

4 * .05 = $.2 ( in nickels)

Hence, she have 12 quarters.

Learn more about unitary method here:

brainly.com/question/22056199

#SPJ2

5 0
2 years ago
Read 2 more answers
Work out the value of x <br>​
GREYUIT [131]
A full circle is 360°.

x + 3x + 90° = 360°

4x = 360° - 90°

4x = 270°

4x/4 = 270°/4

x = 67.5°

Hope it helps! Make me brainliest if it’s correct.
6 0
3 years ago
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