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
icang [17]
3 years ago
11

A certain region of America with over 500,000 households has a mean household income of $70,000 with a standard deviation of $20

,000. Economists plan to take random samples of 625 households and calculate the sample mean income for each sample. Calculate the mean of the sampling distribution of x-bar.
Mathematics
1 answer:
Llana [10]3 years ago
3 0

Answer:

Mean = 70,000 dollars

SD = 800 dollars

For Khan Academy

Step-by-step explanation:

You might be interested in
The weekly salaries of a sample of employees at the local bank are given in the table below. Employee Weekly Salary Anja $245 Ra
evablogger [386]

The variance for the data is  17,507. 5.

Given

The weekly salaries of a sample of employees at the local bank are given in the table below.

Employee Weekly Salary Anja $245 Raz $300 Natalie $325 Mic $465 Paul $100.

<h3>Variance</h3>

Variance is the expected value of the squared variation of a random variable from its mean value, in probability and statistics.

The mean value of the salaries of employees is;

\rm Mean= \dfrac{245+300+325+465+100}{5}\\\\Mean=287

The variance is given by;

\rm  Variance=\sqrt{\dfrac{(245-287)^2 +(300-287)^2 +(325-287)^2 +(465-287)^2 +(100-287)^2}{5-2}} \\\\Variance = 132.316}\\\\On \ Squaring \ both \ the \ sides\\\\Variance^2=17,507. 5

Hence, the variance for the data is  17,507. 5.

To know more about variance click the link given below.

brainly.com/question/7635845

7 0
3 years ago
What is the length of BC ?
MrRa [10]
Looking at this triangle, we can see that is a form of a 45, 45, 90 triangle
This would mean that 2x-24=x-2
Solve: 2x-24=x-2
subtract x from both sides and add 24 to both sides...
x=22
6 0
3 years ago
Please help!!<br> Find the volume of the sphere
Komok [63]

Answer:

Hi , your answer is V = 4/3 πr³.

Hope this helps

4 0
2 years ago
The volume of a cylinder is 2,200 pie cubic inches. The diameter of the circular base is 10 inches. What is the height of the cy
Elis [28]

Answer:

Step-by-step explanation:

H = V/ pie r^2

H = \frac{2200pie}{Pie 5^2}

R= 5 because the radius is half the diameter

Pies cancel out leaving you with:

H = 2200/5^2

H = 2200/25

H = 88

Hope this helps :)

5 0
3 years ago
PLEASE ANSWER <br> WILL<br> AMRL BRAILIEST
Georgia [21]

Step-by-step explanation:

When a number is grouped with the x in this problem it will move the graph right (if it is is minus) and it will

move it left ( if it is plus), therefore the original graph will be move to the left 5 units.

3 0
3 years ago
Read 2 more answers
Other questions:
  • A car drives for 1 hour 55 minutes with a constant speed of 36 km/h and then for another 1 hour 50 minutes with a constant speed
    12·1 answer
  • 8pr/12p in simplest form
    13·1 answer
  • Choose the correct simplification of (7x3 − 8x − 5) + (3x3 + 7x + 1).
    13·2 answers
  • How many liters of water must be added to 15 liters of 40 % sugar syrup to obtain 30 % sugar syrup?
    11·2 answers
  • What is 1.57 equal to ? Please help
    12·1 answer
  • Using the inverse trig functions, find the measure of angle A to the nearest degree.
    9·1 answer
  • Can someone help me out with this inequality problem?? Will give brainliest to best answer!!
    11·1 answer
  • The value of zlatan's house has increased by 7% his house is now valued at £749 000
    7·1 answer
  • П
    9·2 answers
  • Give the appropriate theorem or postulate that can
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!