A statistics teacher has 4 periods of introductory statistics. She wants to get students’ opinions on a new homework policy. To get a sample, the teacher lists every student’s ID number and uses a computer to randomly select 20 of the IDs. Which sampling method was used?

cluster sampling
simple random sampling
stratified random sampling
systematic random sampling

Answers

Answer 1

Answer:

Simple random sampling.

Step-by-step explanation:

In this case, the statistics teacher selects a group of students from his class absolutely at random, without taking into account any specific factor when making said selection, rather than absolute chance.

In this way, in the case the teacher performs a simple random sampling with respect to his class, since the selected students do not respond to any specific characteristics that are required for the sample.

Answer 2

Answer:

The answer is A Cluster

Step-by-step explanation:

I just took the review on EDGE

Related Questions

There were 240 girls and 360 boys at the playground what percentage of children were girls.

Things you need to have

• Answer

• Work

Answers

answer- 40%
work- First you can add the two numbers and get 600. Then divide by six to see that there is 100. Then divide both original numbers by 6 to see that the percentage of girls is 40 and boys is 60.

Answer:

66.67%

Explanation:

240/360

240/360×100/100

240×100

(-------------)× 1/100=66.67/100

360

66.67/100=66.67

The radius of the sphere is 9 inches. Which equation can be used to find the surface area of the sphere?

Answers

Answer:

Option (2)

Step-by-step explanation:

Formula to get the surface area of a sphere is,

Surface area = 4πr²

Here 'r' = Radius of the sphere

We have to calculate the surface area of a sphere with radius r = 9 inches.

By substituting the value of r in the formula,

S = 4π(9)²

Therefore, Option (2) will be the correct option.

Answer:

B. S = 4 pi r squared = 4 pi (9) squared

2.31 (1 repeating) as a fraction

Answers

Answer:

[tex]\frac{231}{100}[/tex]

This is assuming that you can simplify the 2.31 to the nearest hundredth.

I NEED THE ANSWER ASAP PLZ!!!!!!

Answers

Answer:

its D trust me okkkkkkk

I think its A

I wouldn't go with i say tho

Please Help These Are All My Points.

Answers

im pretty sure it’s the second one i’m sorry if i’m wrong

I WILL GIVE MORE POINTS IF I GET THE RIGHT ANSWER

Eric is observing the velocity of a runner at different times. After one hour, the velocity of the runner is 5 km/h. After three hours, the velocity of the runner is 3 km/h.

Part A: Write an equation in two variables in the standard form that can be used to describe the velocity of the runner at different times. Show your work and define the variables used. (5 points)

Part B: How can you graph the equations obtained in Part A for the first 5 hours? (5 points)

Answers

Answer:

v= 6km/h - 1km/h^2 * t

Step-by-step explanation:

From the information, it seems the runner is slowing down because the speed at 1st hour is 5km/h but at 3rd hour becomes 3km/h.

If v= velocity, v0= initial speed, t= time, and the a=acceleration then the function would be:

v= v0 + a * t

To find the acceleration you need to do this equation:

acceleration= velocity1- velocity3 / t3-t1

a = (3km/h-5km/h)/ (3 hour- 1 hour)

a = (-2km/h)/2hour= -1 km/hour^2

After that, you need to find the initial speed. Try to put the 1st-hour variable into the full equation. It would look like this

v= v0 + a * t

5km/h= v0 + (-1 km/hour^2 * 1 hour)

v0= 5km/h + 1km/h

v0= 6km/h

Then the full function would be:

v= 6km/h - 1km/h^2 * t

The graph would look like a backslash(\) from 5 gradually go down to 1.

5 O

4 O

3 O

2 O

1 O

1 2 3 4 5

10 - 3 (z - 2) = 5z + 7

Answers

Answer:

= 9/8

That's the answer

The answer equals to 9/8

Please help me solve these :)
I will give Brainlst:)

Answers

Answer:3 is nonlinear ,1 is function ,domain is the input and the range is the output, mx is the slope and the b is the y intercept

Step-by-step explanation:

Six more than a number,
n, is less than fourteen. Which inequality represents this relationship?

Answers

Answer:

6 + n < 14

just in case...

n < 8

skateboard for $50 that is 20% off, how much would you pay?" Your answer

Answers

Answer:

you will pay 40 dollars

Answer:

$10

Step-by-step explanation:

two ways you can do this:

[tex]\frac{50}{100}[/tex] x 20 = 10.

convert 20% into decimals (so 20/100 = 0.20) then multiply

0.20 x 50 = 10

they both work.

Need help Pronto! Will give braintliest.

Answers

Answer:

Step-by-step explanation:

WHAT DO YOU KNOW ABOUT THE CITY OF ATLANTIS?

Answers

I don't know much about the city of atlantis but I do know that is is a made up or fictional place.

Answer:

Atlantis is a fictional island mentioned in an allegory on the hubris of nations in Plato's works Timaeus and Critias, where it represents the antagonist naval power that besieges "Ancient Athens", the pseudo-historic embodiment of Plato's ideal state in The Republic.

What does the data tell you about the eugenics
movement?

Answers

Answer:

Step-by-step explanation:

More people were sterilized in Virginia than Michigan.

Evaluate: 10/ 12 • 2/ 3

Answers

Answer:

10/ 12 x 2/ 3 = 10/ 12 x 8/ 12 = 80/12 = 6 8/12

Pls mark brainliest, (Plz correct me if wrong)

Step-by-step explanation:

What are the solutions of the quadratic equation?
12x^2 - 64 = -x^4

Answers

C is the answer! Hope this helps!

the product of 3 and the sum of7 and s

Answers

Answer:

the expression would be 3(7+s)

Factor completely x^2 - 81

Answers

Use the sum-product pattern

2
−
8
1
x
2
−
81
x2−81

2
+
9

−
9

−
8
1

Factor [tex]x^2-81[/tex] by using the difference of two squares.

[tex]x^2-y^2=(x+y)(x-y)[/tex]

Our x is x

Our y is 9 (As y² = 81, therefore a single y would be 9)

[tex](x+9)(x-9)[/tex]

Thus, the final answer is (x+9)(x-9)

Tori had $300 unpaid balance after last months payment due is $25. How much of that is interest for one month in the unpaid balance?

Answers

Answer:

$200 a month

Step-by-step explanation:

In the figure,ABC~ DEF. solve for x

Answers

Answer:

B) X = 6

Step-by-step explanation:

The figure transformation is a dilation. And the side lengths increased by two.

Please answer ASAP I have 15 min help

Answers

she did not follow PUMAS...

this means she added before multiplying or dividing

Answer:

Step-by-step explanation:

she was supposed to divide and multiply first and then add those answers

6+6+20=32

The sum of two integers is 9 their difference is 5 what are the 2 integers

Answers

the two integers are 7 and 2

Help me plzzzzzzzzzz

Answers

this is the answers

i need help with this

Answers

Answer:

X=5

Step-by-step explanation:

20= 1/2 x 8 x X

20= 4x

x=5

Divide Express your answer in scientific notation
10.4 x 10
4 x 10
10.4 x 10
4x10

Answers

10.4 x 10 = 104
4 x 10 = 40

Toby's teacher instructs him to arrange the tiles in ascending order. Which tile should Toby place first in his arrangement?

Answers

Answer:

The smallest one first

Step-by-step explanation:

write the value of 50 times the sum of 64 and 36

Answers

e Value of the Expression a. 50 times the sum of 64 and 36. 50 x(64+36)

Answer:

500 :)

Step-by-step explanation:

Here is a balanced hanger diagram:
A circle has a mass of 3 grams and a square has a mass of 2 grams.
Which is the mass of a triangle?
a. 9/5 grams
b. 715 grams
c. 3 grams
d. 11 grams

Answers

Answer:

Step-by-step explanation:

11 grams because the the most logical.

Option C. 3 grams is the answer.

Mass given,

One circle = 3 gramsOne square = 2 grams

For the balanced hanger diagram,

Mass on left arm = Mass on right arm

Mass on left arm = 2.(one triangle) + 6.(one square) + 3.(one circle)

Mass on right arm = 5.(one triangle) + 3.(one square) + 2.(one circle)

Equation for the balanced hanger,

2.(one triangle) + 6.(one square) + 3.(one circle) = 5.(one triangle) + 3.(one square) + 2.(one circle)

Now solve this equation,

(6 - 3).(one square) + (3 - 2).(one circle) = (5 - 2).(one triangle)

3.(one square) + 1.(one circle) = 3.(one triangle)

3.(2) + 1.(3) = 3.(one triangle)

6 + 3 = 3.(one triangle)

One triangle = 3 grams

Therefore, Option (C) will be the correct option.

Learn more,

https://brainly.com/question/15558745

Complete the table by converting the fractions (in the first column) into decimals (in the second column) and vice versa. Fractions Decimals -4/5 1 2/100 0.13 3/4

Answers

Answer:

Step-by-step explanation:

-4/5=-8/10=-0.80

12/100=0.12

0.13=13/100

3/4=75/100=0.75

what is an expression equivalent to 2x+2x+2y+2y

Answers

Answer is 8y because u are adding them together

Answer both questions pls for more points :)

Answers

Answer...

1st is A

2nd is C

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