Not sure what case-control study is, need more clarification?

Question 1 1 / 2 pts You are trying to find the effect of different methods of promotion (Television vs. Social media) on sales. However, you figure out that sales can also be affected by the time of year (e.g. thanksgiving vs. normal time, etc.) when the promotions are run and thus makes sure to control for that. For the afore-mentioned problem match the responses on the left side with the best option on the right. Television and social media Factor levels Methods of promotion used Experimental Factor Sales Time of years ads are run Other Incorrect Match Options: - Observational factor Read the scenarios below and chose 'YES', if you can infer causality or 'NO' if you cannot A. You wake up from sleep and your back hurts. You also notice after a while that you were not sleeping in a proper posture. Can you infer that improper sleep posture has caused this pain? NO B. You are running an experiment to see if watching a sad movie makes everybody sad. You hire a group of students for the experiment, show them the movie and measure how sad they feel. Your measure shows they are feeling sad. Can you infer that the movie caused them to feel sad? YES Answer 1: NO You observed after having the pain that you are not sleeping in a proper posture. Furthermore, other things might have caused the pain (like a sports injury the previous day). Match the following choices in right to the ones in left. You hire two groups for a clinical drug trial. One group is given a placebo while the other group is given the real medicine. You compare the effectiveness of the intervention (giving them the medicine) across the two groups. You divide a sample into two groups. Each group is shown a different price presentation format and the two groups price perception are then measured. You provide a special program that better prepare a person for a job interview. You measure a group of people's income offers from job interviews before they participated in the special program and after they participated in the special program. You invite a group of willing participants for an experiment. You set up the experiment in a room and make sure to reduce/ eliminate as much as possible, effects from factors other than the ones you are interested in. Your experiment lacks: Both Internal and External Validity Internal validity Reliability External validity High external validity implies that the experimenter is making the experiment as close as possible to what happens in reality, which is lacking here. Question 6 0.5 / 1 pts Match the examples on the left to the concept they are related to on the right. You are running a five part study over the course of 5 weeks. You started with 200 respondents but ended only with 40 participants who completed all the 5 parts of the test. You are measuring the strength of a group of respondents. For their selection in the experiment you take them to a gym and ask them to perform rigorous activity for an hour. Now, the respondents who qualify your pretest criteria are taken to the gym immediately and asked to lift heavy weights (so that you can measure their strength). Question 1 1 / 2 pts You are trying to find the effect of different methods of promotion (Television vs. Social media) on sales. However, you figure out that sales can also be affected by the time of year (e.g. thanksgiving vs. normal time, etc.) when the promotions are run and thus makes sure to control for that. For the afore-mentioned problem match the responses on the left side with the best option on the right. Television and social media Factor levels Methods of promotion used Experimental Factor Sales Time of years ads are run Other Incorrect Match Options: - Observational factor Read the scenarios below and chose 'YES', if you can infer causality or 'NO' if you cannot A. You wake up from sleep and your back hurts. You also notice after a while that you were not sleeping in a proper posture. Can you infer that improper sleep posture has caused this pain? NO B. You are running an experiment to see if watching a sad movie makes everybody sad. You hire a group of students for the experiment, show them the movie and measure how sad they feel. Your measure shows they are feeling sad. Can you infer that the movie caused them to feel sad? YES Answer 1: NO You observed after having the pain that you are not sleeping in a proper posture. Furthermore, other things might have caused the pain (like a sports injury the previous day). Match the following choices in right to the ones in left. You hire two groups for a clinical drug trial. One group is given a placebo while the other group is given the real medicine. You compare the effectiveness of the intervention (giving them the medicine) across the two groups. You divide a sample into two groups. Each group is shown a different price presentation format and the two groups price perception are then measured. You provide a special program that better prepare a person for a job interview. You measure a group of people's income offers from job interviews before they participated in the special program and after they participated in the special program. You invite a group of willing participants for an experiment. You set up the experiment in a room and make sure to reduce/ eliminate as much as possible, effects from factors other than the ones you are interested in. Your experiment lacks: Both Internal and External Validity Internal validity Reliability External validity High external validity implies that the experimenter is making the experiment as close as possible to what happens in reality, which is lacking here. Question 6 0.5 / 1 pts Match the examples on the left to the concept they are related to on the right. You are running a five part study over the course of 5 weeks. You started with 200 respondents but ended only with 40 participants who completed all the 5 parts of the test. You are measuring the strength of a group of respondents. For their selection in the experiment you take them to a gym and ask them to perform rigorous activity for an hour. Now, the respondents who qualify your pretest criteria are taken to the gym immediately and asked to lift heavy weights (so that you can measure their strength)