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Veseljchak [2.6K]
3 years ago
12

Which of the following statements represents a difference between a sample survey and an observational study? A) Presence of pop

ulation. B)Inclusion of numerical data. C)People are aware that they are participating. D)Ability to collect information.
Mathematics
2 answers:
LekaFEV [45]3 years ago
8 0

Answer: C) People are aware that they are participating.

The sample survey is the technique which is initiates after taking proper consent from the participants by explaining the purpose of study and then data is collected which can be in the form of output of measurements, opinion about a cause or issue. But the observational study does not explain the purpose of the study to the participants, it just involves the data collection.

Therefore, on the basis of the above description, People are aware that they are participating. is the relevant option.

alexira [117]3 years ago
6 0

Answer:

c seems most likely from the given answers

Step-by-step explanation:


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What is the correct classification of 18x?. . A.. monomial. . B.. binomial.. C.. trinomial.
kaheart [24]
By definition we have to:
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8 0
3 years ago
Read 2 more answers
If f (x) = x² - 7, evaluate the following: f(12) f(-7)
Julli [10]

Answer: f(12) = 137, f(-7) = 42

Step-by-step explanation: In a function, what you want to do is plug in the value they give you for x. This means you substitute x with the value they are looking for.

In this case, they are looking at 12 and -7. Let's do 12 first.

The equation becomes (12^2) - 7. 12^2 is 144, and 144-7 is 137.

Now we do -7. The equation becomes (-7)^2 - 7. -7^2 is 49, and 49 - 7 is 42.

Hope this helped!

7 0
1 year ago
FAST PLEASE
meriva

Answer:

A. 5

Step-by-step explanation:

y2 - y1 / x2 - x1

5 - -5 / 3 -1 = 10/2 = 5

7 0
3 years ago
If 1 factor of 3x3+7x2-7x-3 is (x+3) what are the other two factors
alexandr1967 [171]
<span>3x^3 + 7x^2 - 7x - 3</span>
= (x + 3)(x - 1)(3x + 1)

answer
other two factors (3x + 1) and (x - 1)
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