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Alex
4 years ago
7

give an example of how you would create a sample from the population of the United States using cluster sampling and stratified

sampling then compare and contrast these two methods brainly
Mathematics
2 answers:
Jobisdone [24]4 years ago
6 0

Answer:

For both methods, divide a population into groups.

For cluster sampling, select all of the members in some of the groups.

For stratified sampling, select a random sample from each group.

Blizzard [7]4 years ago
3 0
<span>Divide the US into groups, by state. For cluster sampling, randomly choose twenty states and use the population of those states as the sample. For stratified sampling, randomly choose 10,000 people from every state as the sample.</span>
You might be interested in
A
Mariana [72]

3 10 =30 2 10 + 10=30 so i think its ten they both equal 30

5 0
3 years ago
23.70 divided by 1.8, could you please some how show your work
sdas [7]

1 Shift the decimal points of both 23.7 and 1.8 to the right by 1 decimal place.

(This is needed to convert 1.8 to 18, since long division must divide by a whole number.)

2

3

7

1

8

​18

​

​237

​​


2 Set up the long division.


1 8 | 2 3 7



3 Calculate 23 ÷ 18, which is 1 with a remainder of 5.


1

1 8 | 2 3 7

1 8

5


4 Bring down 7, so that 57 is large enough to be divided by 18.


1

1 8 | 2 3 7

1 8

5 7


5 Calculate 57 ÷ 18, which is 3 with a remainder of 3.


1 3

1 8 | 2 3 7

1 8

5 7

5 4

3


6 Bring down 0, so that 30 is large enough to be divided by 18.


1 3 .

1 8 | 2 3 7 .

1 8  

5 7 .

5 4 .

3 . 0


7 Calculate 30 ÷ 18, which is 1 with a remainder of 12.


1 3 . 1

1 8 | 2 3 7 .

1 8  

5 7 .

5 4 .

3 . 0

1 . 8

1 . 2


8 Bring down 0, so that 120 is large enough to be divided by 18.


1 3 . 1

1 8 | 2 3 7 .  

1 8    

5 7 .  

5 4 .  

3 . 0

1 . 8

1 . 2 0


9 Calculate 120 ÷ 18, which is 6 with a remainder of 12.


1 3 . 1 6

1 8 | 2 3 7 .  

1 8    

5 7 .  

5 4 .  

3 . 0

1 . 8

1 . 2 0

1 . 0 8

1 2


10 Bring down 0, so that 120 is large enough to be divided by 18.


1 3 . 1 6

1 8 | 2 3 7 .  

1 8    

5 7 .  

5 4 .  

3 . 0  

1 . 8  

1 . 2 0

1 . 0 8

1 2 0


11 Calculate 120 ÷ 18, which is 6 with a remainder of 12.


1 3 . 1 6 6

1 8 | 2 3 7 .  

1 8    

5 7 .  

5 4 .  

3 . 0  

1 . 8  

1 . 2 0

1 . 0 8

1 2 0

1 0 8

1 2


12 Bring down 0, so that 120 is large enough to be divided by 18.


1 3 . 1 6 6

1 8 | 2 3 7 .    

1 8      

5 7 .    

5 4 .    

3 . 0  

1 . 8  

1 . 2 0  

1 . 0 8  

1 2 0

1 0 8

1 2 0


13 Calculate 120 ÷ 18, which is 6 with a remainder of 12.


1 3 . 1 6 6 6

1 8 | 2 3 7 .    

1 8      

5 7 .    

5 4 .    

3 . 0  

1 . 8  

1 . 2 0  

1 . 0 8  

1 2 0

1 0 8

1 2 0

1 0 8

1 2


14 Therefore, 23.70 ÷ 1.8 ≈ 13.1666:

13.1666


4 0
4 years ago
Find the points of intersection of the equation: xy=2 and x+y =4
Blizzard [7]

Answer:\Large\boxed{(2+\sqrt{2},~2-\sqrt{x} )~~and~~ (2-\sqrt{2},~2+\sqrt{x} )}

Step-by-step explanation:

<u>Given the system of equations</u>

1)~xy=2

2)~x+y=4

<u>Divide x on both sides of the 1) equation</u>

xy=2

xy\div x=2\div x

y=\dfrac{2}{x}

<u>Current system</u>

1)~y=\dfrac{2}{x}

2)~x+y=4

<u>Substitute the 1) equation into the 2) equation</u>

x+(\dfrac{2}{x} )=4

<u>Multiply x on both sides</u>

x\times x+\dfrac{2}{x}\times x=4\times x

x^2+2=4x

<u>Subtract 4x on both sides</u>

x^2+2-4x=4x-4x

x^2-4x+2=0

<u>Use the quadratic formula to solve for the x value</u>

x=\dfrac{-(-4)\pm\sqrt{(-4)^2-4(1)(2)} }{2(1)}

x=2\pm\sqrt{2}

<u>Substitute the x value into one of the equations to find the y value</u>

xy=2

(2+\sqrt{2} )y=2

y=2-\sqrt{2}

OR

xy=2

(2-\sqrt{2} )y=2

y=2+\sqrt{2}

Therefore, the points of intersection are

\Large\boxed{(2+\sqrt{2},~2-\sqrt{x} )~~and~~ (2-\sqrt{2},~2+\sqrt{x} )}

Hope this helps!! :)

Please let me know if you have any questions

5 0
1 year ago
Read 2 more answers
A hovercraft takes off from a platform.
grigory [225]

Answer:

  11 seconds

Step-by-step explanation:

The value of h(x) is zero when either of the factors is zero:

  x -11 = 0   ⇒   x = 11

  x +3 = 0   ⇒   x = -3

The solution x = -3 is not in the practical domain of the model, so the only reasonable solution is x = 11.

The hovercraft will land 11 seconds after takeoff.

4 0
3 years ago
Para controlar la pandemia, se ha restringido la salida de las personas de sus casas. Esta medida se denomina cuarentena y es un
Bezzdna [24]

Answer:

The graphical representation of the intervals as well as the solutions of the operation on the number line can be found in the attachment.

A ∪ B = (0, 6) ∪ (12, 24)

C ∩ D = (0, 6) ∩ (14, 24)

Question:

To control the pandemic, people have been restricted from leaving their homes. This measure is called quarantine and is one of the main ways to decrease the number of infections. The exit restrictions that have been taken are the following: o

• A: In Guayaquil, the first week you could not leave home from 12:00 to 6:00.

• B: In the rest of the country, the first week you could not leave home from 8:00 p.m. to 6:00 a.m.

• C: In the whole country, from the third week onwards you cannot leave the house from 2:00 pm to 6:00 am.

• D: If the cases of contagion continue to increase potentially, a 24-hour restriction would be considered. Activities 1. Represent in the form of an interval and on the number line the 4 cases of restrictions posed.

2. Solve the interval corresponding to the following operations: A∪B; C∩D

Step-by-step explanation:

1. The time in Hours is represented on the number line.

A) Restrictions From 12.00pm until 6.00am

In hours: 0 to 6.00am; 12.00pm to 24.00pm

(0, 6); (12, 24)

B. Restriction from 8.00pm to 6.00am

In hours: 20:00pm to 24.00pm; 0 to 6:00 am  

(0, 6); (20, 24)

C. Restriction from 2.00pm to 6.00am

In hours: 14:00pm to 24.00pm; 0 to 6:00am

(0, 6); (14, 24)

D. 24hr restrictions

In hours: 00:00am until 24:00pm

(0, 24)

2. From the graph,

A ∪ B = (0, 6) ∪ (12, 24)

C ∩ D = (0, 6) ∩ (14, 24)

Where '∪' mean the union of A and B. That is, we combine all the element of A and B together.

And '∩' mean the intersection of C and D. That is we pick the values common to C and D.

5 0
3 years ago
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