Tom tells you that he can make his roommate take out the trash by simply thinking about his roommate doing it. He agrees with you that this could sometimes just be a coincidence, but he seems to truly believe he can sometimes get people to do things just by thinking about it. You find him understandable when he talks, but sometimes hard to follow. His clothes are messy and don't match. Tom tells you not to tell anyone about his power, because he knows that other people don't like him because they are jealous and they would hurt him if they could. The best diagnosis for Tom is

What is the difference between an observational study and an​ experiment? choose the correct answer below. a. in an​ experiment, a treatment is applied to part of a population and responses are observed. in an observational​ study, a researcher measures characteristics of interest of a part of a population but does not change existing conditions. b. in an​ experiment, a treatment is applied to an entire population and responses are observed. in an observational​ study, a researcher measures characteristics of interest of an entire population but does not change existing conditions. c. in an​ experiment, a researcher measures characteristics of interest of a part of a population but does not change existing conditions. in an observational​ study, a treatment is applied to part of a population and responses are observed. d. in an​ experiment, a researcher measures characteristics of interest of an entire population but does not change existing conditions. in an observational​ study, a treatment is applied to an entire population and responses are observed.