- Identify whether each of the following is an observational study or an experiment, and explain how you know. If it is an observational study, specify whether it is retrospective or prospective, and explain how you know. If it is an experiment, specify whether it is blind, double-blind, controlled, and explain how you know. • Researchers are studying whether eating a small amount of dark chocolate every day affects resting heart rate. They measure the resting heart rate daily for a week before the beginning of the study, and daily for a week after the end of the study, which lasts six months. The researchers are not told ahead of time which participants are and are not eating dark chocolate. O A study tracks the long-term professional careers of students for ten years after they graduate from college. • A psychologist is determining what proportion of her patients with eating disorders experienced harmful body image narratives in childhood. Clinical trial pressure medication are determining which dosage is most effective

C. Evaluate the following 1. P(, 10) 4. P(15, 1) 2. P() 5. P(1,7) 3. P(s)

.  A producer of high quality teas wants to be sure they are filling tea bags with an average weight of 5.5 grams.  Any underfilling or overfilling is undesirable.   The correct set of hypotheses is

(b) Given the results from the local school, do you think the Education Department's claims are false? (Justify your answer.)

5. A representative sample of 50 students from a high school is surveyed. Each student is asked what science class he or she is taking. Science Class Physics Chemistry Biology No. of Students 6. 10 18 Earth Science 4 Health Sciences 12 Select all of the statements that are valid based on the survey results. a. About 20% of students at the high school are taking Chemistry. b. About twice as many students are taking Health Science than are taking Physics. c. For every 150 students we could predict that at least 18 of the students are taking Physics. d. For every 25 students we could predict that at least 4 of the students are taking Earth Science.

14. A researcher is conducting a case study of a famous artist. She interviewed the artist, the artist's friends, and the artist's colleagues. She is then going to describe the artist using his own words (and the words of his friends and colleagues), while looking for some themes she finds in their descriptions. What type of research is this? Qualitative Quantitative