PHC 4069-Suppose you wish to compare the mean final
Suppose you wish to compare the mean final grade of the Biostatistics in Society class of 2013 to the mean grade of the Biostatistics in Society class of 2010 in the College of Public Health, USF. Which is the most appropriate technique for gathering the needed data?
Randomized trial | |
Observational study |
Census | |
Sample survey |
In one study on the effect of Dyazide on blood pressure level, 25 subjects were randomly chosen to receive Dyazide and 25 were chosen to receive a placebo. These subjects were later examined to check for differences in their blood pressure levels. In a second study, 200 subjects who reported taking Dyazide for a long period of time had their blood pressure levels compared with those of 200 people who had never taken Dyazide.
Which of the following statements is correct?
The first study was a controlled experiment, while the second was an observational study. | |
The first study was an observational study, while the second was a controlled experiment. |
Both studies were controlled experiments. | |
Both studies were observational studies. |
The duration of length of stay at Tampa Bay Nursing Home is
Discrete | |
continuous |
qualitative | |
None of the above |
Which of the following methods of graphing sample data can help you in determining the shape of a frequency distribution for the variable age (measured in years)?
Stem-and leaf display | |
Histogram |
Box plot | |
All of the above |
A researcher would like to study BMI levels in adults 20-40 years of age. She selected 9 patients and found their BMI values to be: 25, 19, 20, 30, 32, 37, 22, 27, 24
The mean BMI level of this group of patients is
25.8 | |
26.0 |
26.2 | |
27.9 |
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Solution: PHC 4069-Suppose you wish to compare the mean final