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Elis [28]
3 years ago
13

A study conducted by researchers from the Department of Education wanted to know the average debt of college students in the Uni

ted States. In order to obtain a sample representative of all students, the researchers divided college students into the four classes (freshman, sophomore, junior, and senior) and then took a random sample of students from each class. Which sampling method did they use?
A) Stratified random sampling
B) Systematic random sampling
C) Cluster sampling
D) Simple random sampling
Mathematics
1 answer:
Temka [501]3 years ago
3 0

Answer: A) Stratified random sampling

Step-by-step explanation:

Since , the researchers divided college students into the four classes (freshman, sophomore, junior, and senior) and then took a random sample of students from each class.

That means each category is participating in the sample.

It means , they used stratified sampling method where each class denotes a strata.

  • <em>Stratified random sampling</em><em> is a kind of random sampling technique in which the researcher divides the whole population into some finite number of groups also known as strata , the he randomly pick individuals from each strata to make a sample. </em>

Here ,  each category participates in researcher's analysis.

Hence, the correct answer is A) Stratified random sampling .

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From the question, the equations are given as

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y + x = 5


From the question, we understand that:

The equations must not be converted to the same form before the question is solved

The equation of a linear function is represented as

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Where m represents the slope and c represents the y-intercept

When the equation y = mx + c is compared to y = x + 5, we have

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