Question

question 4 determine whether the study described below is an observational study or a randomized experiment. a survey is conducted asking 500 people, do you prefer coffee, tea or neither? determine whether the study described below is an observational study or a randomized experiment. three hundred people are asked to perform a taste test in which they eat granola from two randomly placed, unmarked cups and asked which granola they prefer.

Explanation:

In an observational study, researchers observe and record data without interfering or manipulating variables. In a randomized experiment, researchers manipulate one or more variables and randomly assign participants to different treatment groups. For the first case, just asking people their preference is an observational study as there is no manipulation. For the second case, the taste - test with randomly placed granola involves manipulation (the type of granola) and random assignment, so it's a randomized experiment.

Answer:

Question 4: O Observational study
Second question: O Randomized experiment