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
Luba_88 [7]
3 years ago
14

A student was given an assignment to determine the percentage of students that brought a bag lunch to school. The student chose

5 random classrooms and surveyed every student in those classrooms. Which type of sampling did the student use?
A. convenience

B. systematic

C. stratified

D. cluster
Mathematics
2 answers:
tiny-mole [99]3 years ago
8 0
I believe it's cluster sampling.
JulsSmile [24]3 years ago
3 0

Answer: D. cluster

Step-by-step explanation:

A cluster sampling is a random sampling method in which a researcher splits the entire population into separate groups known as clusters.Then, he draw a random sample of clusters from the population.

After this he performs his analysis on data from the sampled clusters.

Given: A student was given an assignment to determine the percentage of students that brought a bag lunch to school. The student chose 5 random classrooms and surveyed every student in those classrooms.

Here classes is denoted as clusters and the student as researcher.

Hence, the cluster sampling is used by the student.

You might be interested in
Which statement is not true for the function notation of the volume of a cube, V(s) = s3?
Volgvan
<h3>Answer:</h3>

b. The side length of a cube is dependent on the volume.

<h3>Step-by-step explanation:</h3>

The function definition V(s) means the volume (V) is dependent upon the side length (s), <em>not the other way around</em>.

4 0
3 years ago
WILL MARK YOU BRAINLIEST
love history [14]
<h3><em>(8)2+(x)2=(10)2</em></h3><h3><em>64+x2=100</em></h3><h3><em>x2=100-64</em></h3><h3><em>x2=36</em></h3><h3><em>x=6</em></h3><h3><em>BE = 6</em></h3><h3><em>hope it helps..stay blessed...thank you....</em></h3>
4 0
3 years ago
Three points that are not collinear determine three lines. How many lines are determined by nine points, no three of which are c
Drupady [299]

Answer:

Use the method for solving Bernoulli equations to solve the following differential equation.

StartFraction dy Over dx EndFraction plus StartFraction y Over x minus 9 EndFraction equals 5 (x minus 9 )y Superscript one half

Step-by-step explanation:

Use the method for solving Bernoulli equations to solve the following differential equation.

StartFraction dy Over dx EndFraction plus StartFraction y Over x minus 9 EndFraction equals 5 (x minus 9 )y Superscript one half

4 0
4 years ago
If you have a cubic polynomial of the form y = ax^3 + bx^2 + cx + d and lets say it passes through the points (2,28), (-1, -5),
nikklg [1K]

Step-by-step explanation:

<u>Step 1:  Solve using the first point</u>

<em>(2, 28)</em>

28 = a(2)^3 + b(2)^2 + c(2) + d

28 = 8a + 4b + 2c + d

<u>Step 2:  Solve using the second point</u>

<em>(-1, -5)</em>

-5 = a(-1)^3 + b(-1)^2 + c(-1) + d

-5 = -a + b - c + d

<u>Step 3:  Solve using the third point</u>

<em>(4, 220)</em>

220 = a(4)^3 + b(4)^2 + c(4) + d

220 = 64a + 16b + 4c + d

<u>Step 4:  Solve using the fourth point</u>

<em>(-2, -20)</em>

-20 = a(-2)^3 + b(-2)^2 + c(-2) + d

-20 = -8a + 4b - 2c + d

<u>Step 5:  Combine the first and fourth equations</u>

<u />28 - 20 = 8a - 8a + 4b + 4b + 2c - 2c + d + d

8 = 8b + 2d

8 - 8b = 8b - 8b + 2d

(8 -8b)/2 = 2d/2

4 - 4b = d

<u>Step 6:  Solve for c in the second equation</u>

-5 + 5 = -a + b - c + d + 5

0 + c = -a + b - c + c + d + 5

c = -a + b + d + 5

<u>Step 7:  Substitute d with the stuff we got in step 5</u>

c = -a + b + (4 - 4b) + 5

c = -a + b + 4 - 4b + 5

c = -a - 3b + 9

<u>Step 8:  Substitute d and c into the first equation</u>

<u />28 = 8a + 4b + 2(-a - 3b + 9) + (4 - 4b)

28 = 8a + 4b - 2a - 6b + 18 + 4 - 4b

28 - 22 = 6a - 6b + 22 - 22

6 / 6 = (6a - 6b) / 6

1 + b = a - b + b

1 + b = a

<u>Step 9:  Substitute a, b, and c into the third equation</u>

220 = 64(1 + b) + 16b + 4(-(1 + b) - 3b + 9) + (4 - 4b)

220 = 64 + 64b + 16b + 4(-1 - b - 3b + 9) + 4 - 4b

220 - 100 = 60b + 100 - 100

120 / 60 = 60b / 60

2 = b

<u>Step 10:  Find a using b = 2</u>

a = b + 1

a = (2) + 1

a = 3

<u>Step 11:  Find c using a = 3 and b = 2</u>

c = -a - 3b + 9

c = -(3) - 3(2) + 9

c = -3 - 6 + 9

c = 0

<u>Step 12:  Find d using b = 2</u>

d = 4 - 4b

d = 4 - 4(2)

d = 4 - 8

d = -4

Answer:  a = 3, b = 2, c = 0,d = -4

6 0
3 years ago
Read 2 more answers
Determine whether the relation shown is a function. Explain how you know.
lutik1710 [3]

Answer:

  It is not a function

Step-by-step explanation:

The plot shows (1, 1) and (1, 3) are both defined by the relation. It does not pass the "vertical line test", which requires the relation be single-valued everywhere.

3 0
3 years ago
Read 2 more answers
Other questions:
  • a certain computer loses half of its value every two years. after how many years will the computer be worth 12.5% of the initial
    11·2 answers
  • According to cbs money watch, the average monthly household cellular phone bill is $100. suppose monthly household cell phone bi
    8·1 answer
  • Which is bigger 40% of 120 or 1/4 of 200
    11·1 answer
  • Help with geometry, right triangle congruence and missing side/angle
    8·1 answer
  • Need help with 1 question
    5·1 answer
  • 12.28 as a mixed number
    7·2 answers
  • Find the 120th term, given the first term and the common difference. <br> a =52 and d=12<br>  1
    8·1 answer
  • The diagram shows a circle in a square 6cm calculate the shaded area take pi to 3.142
    15·1 answer
  • Solve for x in -14x⁴ - 8x³ = 32​
    6·1 answer
  • Find the value of the missing angle in this triangle show work on how you found the answer.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!