In which type of statistical study is the population influenced by researchers? A. experiment B. Researchers do not influence th
e population in any of the statistical studies. C. observational study D. survey
1 answer:
Using statistical concepts, it is found that the study in which the population is influenced by researchers is given by:
A. experiment.
<h3>What is the difference between and experimental and an observational study?</h3>
- Experimental study: In an experimental study, there is an intervention in a sample, and it's effect is studied.
- Observational study: In an observational study, the sample is just analyzed, without any intervention.
Influence is an intervention, hence option A is correct.
More can be learned about experimental and observational studies at brainly.com/question/24321224
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Answer:
7x - 8.
Step-by-step explanation:
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I believe the answer is B. -3.
(2x + 3) • (x + 3)
2x • x = 2x^2
2x • 3 = 6x
3 • x = 3x
3 • 3 = 9
6x and 3x combine to get 9x, which when all written out is equal to your original trinomial.
