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[Choose} PLEEASE HELP
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5 votes
[Choose} PLEEASE HELP

[Choose} PLEEASE HELP-example-1
User Shenique
by
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2 Answers

5 votes

Answer:

i think the second one

Explanation:

User Max Murphy
by
8.9k points
6 votes

Answer:

experimental study

Explanation:

observational study: no variable is controlled by researchers

experimental study: a variable is controlled by researchers

survey: a survey is similar to a poll

User Retype
by
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