2. What was the response variable measured in the study? mcmor 1.4 Observation v

Question

2. What was the response variable measured in the study? mcmor 1.4 Observation versus Experimental part 2 To research the effects of "dietary patterns" on blood pressure in 459 sub- jects, subjects were randomly assigned to three groups and had their meals prepared by dieticians. Those who were fed a diet low in fat and cholesterol that was high in fruits and vegetables, a diet known as the DASH diet which was full of low-fat dairy foods, and a control diet. The result was that the DASH diet lowered their systolic blood pressure by an average of 6.7 points when compared to the control diet. 1. Was this an observational study or experiment? 2. How many subjects were involved in the study? 3. How many factors are in the study? 4. What is the number of treatments, and what are they? 5. What is the response variable measured? expevimen 3 treat ment cicrs 6. Was the study a blocked design? 7. Was the study a double-blind study? 8. What was the conclusion of the study? 2 Probability .1 Getting Married hoose an American adult at random. The probability that you choosea

Explanation / Answer

3. There were two factors in the study. They are fat and cholestrol.

5. The response varible that is measured is systolic blood pressure. Because, this systolic blood pressure is measured and compared at the end of the experiment.

6. Yes. the study was a blocked design. Because, the experimenter divided the 459 people in random subgroups, which are called as blocks and each group or block is subjected to treatment conditions.

7. No. The study was not a double blind study. A double blind study is the one in which both participants and experimenters do not know who is receiving particular treatment. But in this case, the experimenter know which participant is subjected to which kind of meal.

8. The conclusion of the study is that, DASH diet lower the systolic blood pressure by an average of 6.7 points compared to control diet.

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