Answer:
An observational study.
Explanation:
Observational studies are those studies in which the researchers note the effects of risks factor, diagnostic test, or treatment without interrupting in it by changing anything. It is an investigative study that aims at distinguishing the effects caused by the treatment.
<u>In the given case, the researcher has used the observational study method to identify the effects of exercise on reducing the cholesterol level. He divided the people into two groups with 50 each. The research was performed without an awareness of these people as well as the technician measuring the cholesterol level. Thus it exemplifies an observational study</u>.
So, the correct answer is the observational study.
In order to decrease bias and magnify validity, researchers need to employ systematic sampling techniques when making observations. A technique that observers can use to systematically they record all of the given options.
<h3>What is Event Sampling ? </h3>
Event sampling is defined as this is the method used to collect all the data by observing participants for a definitive length of time.
<h3>What is Time Sampling? </h3>
Time sampling is defined as this is the process used to accumulate information by observing participants at a certain time interval to record if the behaviour or activity has occurred.
<h3>What is Situation Sampling? </h3>
Situation sampling is defined as this is the method of collecting the information by looking participants at many locations under different circumstances.
Learn more about the Sampling here: brainly.com/question/2717098
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NOTE: The given question is incomplete on the portal. Here is the complete question.
QUESTIONS: In order to reduce bias and enhance validity, researchers need to employ systematic sampling techniques when making observations. A technique that observers can use to systematically select what they record is:
A) All of these options
B) event sampling
C) time sampling
D) situation sampling
If you forget your social security number you just look at your social security card
The answer is A because bread sticks aren't gonna support them getting an open campus and also i got it right on a test that I just took.
With the westward expansion, there was a growing class of farming people who owned huge lands and had farms and ranches. When things such as failing crops or harsh economy hit, they wanted help and since they couldn't get it, their discontent grew, which is why they formed the Populist party.
