A researcher randomly selects 300 people and divides them into groups based on w

Question

A researcher randomly selects 300 people and divides them into groups based on whether they are right handed or left handed.  She then records each person's weight and body fat percentage for each group to see if there is a difference between the two groups. Which of the following is true?

This was an experiment because the results concerned a health issue.

This is an observational study, as the researchers recorded two different values.

This is a combination of experiment and observational study.

This was an experiment because there were two groups involved.

This is an experiment as the experimenter randomly selected the 300 people.

This is an observational study, as the researchers did not assign whether or not each person was left handed or right handed.

This was an experiment because the results concerned a health issue.

This is an observational study, as the researchers recorded two different values.

This is a combination of experiment and observational study.

This was an experiment because there were two groups involved.

This is an experiment as the experimenter randomly selected the 300 people.

This is an observational study, as the researchers did not assign whether or not each person was left handed or right handed.

Explanation / Answer

This is an observational study, as the researchers did not assign whether or not each person was left handed or right handed.

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