Question: Identify the experimental design problem - Team 1 Identify the problems with the following experimental designs and the conclusions derived from these experiments: -Study #1:

Identify the experimental design problem - Team 1 Identify the problems with the following experimental designs and the conclusions derived from these experiments: -Study #1: Sam wants to know if watching scary movies during pregnancy could increase the blood pressure of the mother. To answer this question, Sam recruits 20 pregnant women, have them watch a scary movie and then hands them a questionnaire asking them how they felt throughout the movie. Sam then analyzes the answers to the questionnaire to see if there was an effect from watching the scary movie. -Study #2: Jose wants to know if taking an extra credit workshop increases student performance in biology courses. Jose asks for students to volunteer to take the workshop and he then compares the exam scores of students who completed the workshop with the scores of students who didn't complete the workshop. -Study #3: Mary wants to know if a new brand of fertilizer would be effective to help her plants grow faster. She has a large plot with 200 plants. To half of the plants she applies the fertilizer. When applying the fertilizer, she has to dig a small hole near each plant and then she covers it with the fertilizer and adds some water to even out the soil. To the other half of the plants don't receive the fertilizer and she leaves them alone. -Study #4: Chris wants to know if an herbal remedy protects people from the flu. They recruit 200 college students, half of the volunteers drink the herbal remedy and the other half drink something that tastes the same but doesn't have the key ingredient. None of the volunteers nor the researchers directly interacting with the volunteers know which drink they got. Chris and their team follow the volunteers for a semester and track who gets the flu and who didn't. At the end of the semester Chris finds that those who got the

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