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
Ulleksa [173]
2 years ago
11

Using the textbook example of 420 California school districts and the regression of testscores on the student-teacher ratio, you

find that the standard error on the slope coefficient is 0.51 when using the heteroskedasticity robust formula, while it is 0.48 when employing the homoskedasticity only formula. When calculating the t-statistic, the recommended procedure is to A. use the homoskedasticity only formula because the t-statistic becomes larger B. first test for homoskedasticity of the errors and then make a decision C. use the heteroskedasticity robust formula D. make a decision depending on how much different the estimate of the slope is under the two procedures
Mathematics
1 answer:
rosijanka [135]2 years ago
4 0

Answer:

The answer is "Option C".

Step-by-step explanation:

Robust standard errors or generic White-Huber mistakes depending on this procedure. This is also recognized as the Variance Sandwich Stimator because of the appearance of the formula. Therefore, which is under homoskedasticity, robust error terms were appropriate, in which the standard deviations of its predictor variables are non-constant and are tracked across different values or linked to pre-time periods of an exponential function.

You might be interested in
(x^2+3x+1)(x^2-2x+5)
deff fn [24]

Answer:

x^4 + x^3 + 13x + 5

Step-by-step explanation:

5 0
3 years ago
Write a paragraph (4-5 sentences) explaining how we can help or change racism to black people
Nuetrik [128]

Answer

A few ways we could stop racism against black people in this country is to stop the perpepuation of black stereotypes in media. Such as the loud, aggressive black man, or the rude, catty black woman. It causes a harmful view on black people and can result in racial profiling. Another way to combat this racism is to fight off systemic racism. Black people who have unique names, usually African names, are more likely to get turned down for a job when they turn in their resume to an establishment. This is because they automatically assume that they'll be trouble, and won't be a good worker.

4 0
3 years ago
Solve the equation x2+6x+8=0?
Aleksandr-060686 [28]

Answer:

28 , 28, -14

Step-by-step explanation:

x2+6x+8=0

4(2)+6(2)+8=0

8+12+8=0

28=0

x2+6x+8=0

-4(2)+6(2)+8=0

8+12+8=0

28=0

x2+6x+8=0

-8(2)+6(-1)+8=0

-16-6+8

-14=0

3 0
3 years ago
The mean life span of a brand name tire is 50,000 miles. Assume that the life spans of the tires are normally distributed, and t
Vlada [557]

Answer:

a) P(X

b) P(\bar X>50200)=1-0.994=0.0062  

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Let X the random variable that represent the mean life span of a brand name tire, and for this case we know the distribution for X is given by:

X \sim N(\mu=50000,\sigma=800)  

Part a

We want this probability:

P(X

The best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X

Part b

Let \bar X represent the sample mean, the distribution for the sample mean is given by:

\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})

On this case  \bar X \sim N(50000,\frac{800}{\sqrt{100}})

We want this probability:

P(\bar X>50200)=1-P(\bar X

The best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

If we apply this formula to our probability we got this:

P(\bar X >50200)=1-P(Z

P(\bar X>50200)=1-0.994=0.0062  

3 0
3 years ago
What’s a Set theory review
LUCKY_DIMON [66]

A set could be a collection of objects. These objects are called components of the set. ii) Subset. A subset b of a set a could be a set whose components are too components of a.

Please correct any mistakes!! :)

3 0
3 years ago
Other questions:
  • How can I use fraction tiles to help me divide a whole number by a unit fraction
    7·1 answer
  • Which of the following equals cos 80°<br>A) sin 20°<br>B) sin 100°<br>c) sin 10°<br>D) sin 80°​
    11·1 answer
  • Two sides of an isosceles triangle
    10·2 answers
  • FIRST PERSON TO ANSWER GETS BRAINIEST ANSWER SO HURRY QUICK QUICK FIRST PERSON TO ANSWER GETS BRAINIEST ANSWER SO HURRY QUICK QU
    14·1 answer
  • Determine the indicated side length of the golden rectangle. round your answer to the nearest hundreth....
    14·1 answer
  • Helppp plzzz fasttt !!!!
    8·2 answers
  • Please help me dont add a link you'll get reported
    9·1 answer
  • Jabari drives 20.4 miles in 17 minutes. He passes a sign which gives the speed limit as 55 mph. By how much, in mph, did Jabari'
    14·1 answer
  • A concession stand at a baseball game sells hot dogs and boxes of popcorn. Justin buys a total of 9 snacks. The number of popcor
    5·1 answer
  • Help me pleaseeeeeeeeee ​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!