Answer:
N/A
Explanation:
Need more context. Question is incomplete
Pretty sure it’s software design
Answer:
In an observational study, we measure or survey members of a sample without trying to affect them. In a controlled experiment, we assign people or things to groups and apply some treatment to one of the groups, while the other group does not receive the treatment.
Explanation:
Where is the answer choices? if i saw answwr choices i could assist you.