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
KonstantinChe [14]
3 years ago
14

A school teacher wants to survey students at her elementary school. She surveys 20 students from each grade level. What type of

sampling technique she is using
Mathematics
1 answer:
Elan Coil [88]3 years ago
4 0

Answer:

Stratified Random sampling

Step-by-step explanation:

When a random observations are selected from a number of individual groups in a particular population, the type of sampling technique is called Stratified Random sampling. Stratified Random sampling begins with the partitioning or splitting or a population into subgroups. A number of random selection are then made from each of the subgroups to form a collection of larger samples. This is different from the simple random sampling technique which makes random selection directly from a larger sample or population without prior partitioning of the population. The different grades of students represents the individual stratum from which random selections are made.

You might be interested in
I nene help with this please. It a quiz
Vladimir [108]
58 if you add the two numbers then subtract the answer from 180 that’s the answer
8 0
2 years ago
WILL GIVE BRAINLIEST What is the perimeter of the track, in meters? Use π = 3.14 and round to the nearest hundredth of a meter.
Ivenika [448]

Answer:

Perimeter = 317 m

Step-by-step explanation:

Given track is a composite figure having two semicircles and one rectangle.

Perimeter of the given track = Circumference of two semicircles + 2(length of the rectangle)

Circumference of one semicircle = πr  [where 'r' = radius of the semicircle]

                                                       = 25π

                                                       = 25 × 3.14

                                                       = 78.5 m

Length of the rectangle = 80 m

Perimeter of the track = 2(78.5) + 2(80)

                                     = 157 + 160

                                     = 317 m

Therefore, perimeter of the track = 317 m

7 0
3 years ago
Answers are needed urgently..ty​
SIZIF [17.4K]

Angle <QAB is =15° because the opposite angles of an isosceles triangle are equal.

The length of the straight line AB = 80cm

<h3>Calculation of angle of a triangle</h3>

The angle at a point = 360°

Angle AQB= 360 - 210° = 150

But the angle that makes up a triangle= 180°

180-150= 30°

But <QAB = <QBA because triangle AQB is an isosceles triangle.

30/2 = 15°

To calculate the length of the straight line the following is carried out using the sine laws.

a/ sina, = b sinb

a= 8cm, sin a { sin 15)

b= ? , sin B = 150

make b the subject formula;

8/sin15= b/sin 150

b= 8 × sin 150/sin 15

b= 80cm

Learn more about isosceles triangle here:

brainly.com/question/25812711

#SPJ1

7 0
2 years ago
If a carton contains 6 eggs, how many eggs are there in 13 cartons? would it be 6x13?? which is equal to 78 I'm not sure.
qwelly [4]

Answer:

<em>78 eggs</em>

Step-by-step explanation:

13 × 6 = 78 eggs

Hope this helps! :)

6 0
3 years ago
Read 2 more answers
What is the same as 1 cm to 1 km
lana [24]
Pretty easy little one hehe, hoped this helped 1m=1000mm
6 0
3 years ago
Other questions:
  • a jar that has 5 yellow, 3 red, and 8 green marbles. What is the probability of selecting a red marble from the jar
    9·1 answer
  • a woman walks in and steals 100 from a register. 5 minutes later uses the same 100 to buy merchandise from that same store and b
    15·1 answer
  • Im badd i kinda understand but not really understanding it
    7·2 answers
  • -x+6is the same as -(x-6) how do I know? Pls help
    6·1 answer
  • a cube with side lengths s has a volume of 64 cubic units. what is the length of the side of the cube?
    8·1 answer
  • Solve the following systems of equations by graphing. Write your answer in the form of (x, y).
    6·1 answer
  • Which is calculated by using an exponential function?
    14·1 answer
  • Evaluate the expression 4^3+(96/8)*5)-48 =
    13·1 answer
  • If you place $25 per month in a wall safe for 2 years, how much will you save?
    11·2 answers
  • <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B5%7D%7B3%7D%20%2B%20%20%5Cfrac%7B4%7D%7B6%7D%20%20%3D%20" id="TexFormula1" title=
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!