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Evgesh-ka [11]
4 years ago
9

What is cluster sampling and what is stratified sampling?

Mathematics
1 answer:
adelina 88 [10]4 years ago
7 0

In stratified sampling, a sample is drawn from each strata (using a random sampling method like simple random sampling or systematic sampling).  In cluster sampling, the sampling unit is the whole cluster; Instead of sampling individuals from within each group, a researcher will study whole clusters.

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Please answer theses and show the work
NikAS [45]
2.) 7a^2 + 50a + 7 = 7a^2 + a + 49a + 7 = a(7a + 1) + 7(7a + 1) = (a + 7)(7a + 1)

3.) 3x^2 + 11x - 20 = 3x^2 - 4x + 15x - 20 = x(3x - 4) + 5(3x - 4) = (x + 5)(3x - 4)

4.) x^2 + 7x - 18 = x^2 - 2x + 9x - 18 = x(x - 2) + 9(x - 2) = (x + 9)(x - 2)
6 0
4 years ago
Indicate all the possible values for the variable in each of the<br> expressions:<br> 13–2x + V1-x
schepotkina [342]

Answer: -3

Step-by-step explanation:

13−2x+V1−x

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13−3x+V

1

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​

4 0
3 years ago
Is my teacher allowed to kick us out of the meets and mark as absent if we don't come in even if cant
Anon25 [30]

Answer:

Um one they are probably not alowed to kick you out of meetings and mark you absent and two it you cant get in then email them.

7 0
3 years ago
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What single transformation was applied to triangle A to get triangle B?
qwelly [4]

Answer:

The answer is below

Step-by-step explanation:

Transformation is the movement of a point from its initial location to a new location. Types of transformation are reflection, rotation, dilation, and translation.

Translation is the movement of a figure up, down, left or right.

Dilation is the enlargement or reduction in the size of a figure by a factor.

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From the image attached, triangle A was dilated (reduced) to produce triangle B.

6 0
3 years ago
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ExtremeBDS [4]

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hello it is so

Step-by-step explanation:

simple simply do the division if don't I can

6 0
3 years ago
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