16. Chapter 1, Problem 1.14 Aa Aa For each of the studies described, explain whe

Question

16. Chapter 1, Problem 1.14 Aa Aa For each of the studies described, explain whether the study was an observational study or a randomized experiment. A group of 100 students was randomly divided, with 50 assigned to receive Vitamin C and the remaining 50 to receive a placebo, to determine whether or not Vitamin C helped to prevent colds. A random sample of patients who received a hip transplant operation at Stanford Hospital during 2000 to 2010 will be followed for 10 years after their operation to determine the success (or failure) of the transplant. Volunteers with high blood pressure were randomly divided into two groups. One group was taught to practice meditation, and the other group was put on a low-fat diet. After 8 weeks, reduction in blood pressure was compared for the two groups. A study compared the IQ scores from 50 children whose mothers smoked to the IQ scores from 50 children whose mothers didn't smoke, to determine whether IQ scores of children are affected by their mothers' smoking habits. Observational study Randomized experiment An educator compared the effectiveness of computer software that teaches readingD with a standard curriculum. The educator tested the reading ability of a group of 60 students and then randomly divided them into classes of 30 students each. One class used the computer software regularly, while the other class used a standard curriculum. At the end of the semester, the educator retested the students and compared the mean increase in reading ability for the two groups

Explanation / Answer

a) Randomized experiment

b) Randomized experiment

c) Randomized experiment

d) Observational Study

e) Randomized Experiment

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.