tessanicholson
tessanicholson tessanicholson
  • 01-10-2020
  • Mathematics
contestada

[Choose} PLEEASE HELP

Choose PLEEASE HELP class=

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milohakala
milohakala milohakala
  • 01-10-2020

Answer:

experimental study

Step-by-step 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

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Dyan153
Dyan153 Dyan153
  • 02-10-2020

Answer:

i think the second one

Step-by-step explanation:

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