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2 years ago

a large school surveys 100 people by taking random samples of 10 teachers and 90 students. what type of sample is this

Mathematics

1 answer:

bearhunter [10]2 years ago

6 0

Answer:

Stratified Sampling

Step-by-step explanation:

Stratified sampling involves dividing the population into subpopulations that may differ in important ways. It allows you draw more precise conclusions by ensuring that every subgroup is properly represented in the sample.

To use this sampling method, you divide the population into subgroups (called strata) based on the relevant characteristic (e.g. gender, age range, income bracket, job role).

Based on the overall proportions of the population, you calculate how many people should be sampled from each subgroup. Then you use random or systematic sampling to select a sample from each subgroup.

I hope this helped!

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Mrs. Green wrote the following problem on the board: Lisa and Frank share 1/3 pound of cherries equally. How many pounds cherrie

kakasveta [241]

0.5/ 1.5 ? I think not sure thi

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3 years ago

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Evaluate the difference quotient for the function f(x)=x^2+3x-7

otez555 [7]

I can't really understand it but I am assuming you need help solving the function but no one can do so if you don't give the x but ill solve for 1
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3 years ago

In △ABC, m∠A=50∘, m∠B=60∘, and m∠C=70∘.

kiruha [24]

Given:

In $\Delta ABC, m\angle A=50^\circ, m\angle B=60^\circ$ and $m\angle C=70^\circ$ .

$\Delta ABC$ is rotated $90^\circ$ counterclockwise to $\Delta XYZ$ .

To find:

The measure of angle Z.

Solution:

We know that the rotation is a rigid transformation. It means the image and figure are congruent to each other.

$\Delta ABC$ is rotated $90^\circ$ counterclockwise to $\Delta XYZ$ . So, $\Delta ABC\cong \Delta XYZ$ .

$\angle C\cong \angle Z$ (CPCTC)

$m\angle C=m\angle Z$

$70^\circ=m\angle Z$

Therefore, the measure of angle Z is 70 degrees.

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3 years ago

The equation y minus 1 = negative 7 (x minus 3). is written in point-slope form. What is the y-intercept of the line? –4 –2 20 2

dusya [7]

Answer:

Step-by-step explanation:

Hello!

We can convert it into slope-intercept form.

Slope - Intercept Form: $y = mx +b$

m = slope
b = y-intercept

<h3>Convert</h3>

y - 1 = -7(x - 3)
y = -7x + 21 + 1
y = -7x + 22

The y-intercept of the line is 22.

<h3 />

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2 years ago

EXPERT HELP: DON'T GUESS EXPLAIN THE ANSWER OR YOU WILL BE REPORTED

sveticcg [70]

Answer:

The correct answer is A.

Step-by-step explanation:

Given that a weather researcher compared Dublin, Ireland to Madrid, Spain, and she found that Dublin had a mean average temperature of 56.1ºF with a mean average deviation of 6.4ºF, while Madrid had a mean average temperature of 68ºF with a mean average deviation of 12.1ºF, the following conclusions can be drawn:

68 is higher than 56.1, so clearly Madrid has a higher average temperature than Dublin.

In turn, 12.1 is greater than 6.4, with which Madrid has a greater temperature variation than Dublin.

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3 years ago