PHC 4069 - Biostats Exam 1 UPDATED
QUESTIONS AND CORRECT ANSWERS
Statistic - CORRECT ANSWER A numerical value used to summarize data that you have
calculated is known as a
Random sampling - CORRECT ANSWER Suppose you wish to compare the mean weight of
faculty at USF to the mean weight of faculty at the University of Florida. Due to time and financial
constraints you are informed that you cannot collect information from every faculty member in the
population of interest. Which is the most appropriate technique for gathering the needed data?
The first study was a controlled experiment, while the second was an observational study. -
CORRECT ANSWER In a study on the effect of exposure to insulation material on the risk of
lung cancer, the number of deaths from lung cancer occurring among 825 insulation plant workers
employed between 1941 and 1944 was compared to the number of deaths from lung cancer occurring
among 700 coworkers who did not work with insulation during the same time period. In a second
study, the medical records of 50 insulation plant workers who died of lung cancer were compared to
those of 100 coworkers who died free of lung cancer in order to assess if they worked with
insulation.Which one of the following statements is correct?
Discrete - CORRECT ANSWER Identify the given random variable as being qualitative or
quantitative (discrete or continuous).Years of education completed.
Height of USF students in centimeters - CORRECT ANSWER Which of the following comes
closest to a being quantitative (continuous) random variable?
Systematic sampling - CORRECT ANSWER Suppose that researchers are interested in
comparing average sugar intake among young adults (ages 18-35), middle-aged adults (ages 36-55)
and senior citizens (ages 56 and over) in Hillsborough County. To collect data, they consult a
Hillsborough County registry and randomly select 1,000 respondents from each age category to
receive a mail-in survey.
Identify the sampling technique used.
Body temperature (ºf) - CORRECT ANSWER Which one of the following is not a discrete
quantitative variable?
QUESTIONS AND CORRECT ANSWERS
Statistic - CORRECT ANSWER A numerical value used to summarize data that you have
calculated is known as a
Random sampling - CORRECT ANSWER Suppose you wish to compare the mean weight of
faculty at USF to the mean weight of faculty at the University of Florida. Due to time and financial
constraints you are informed that you cannot collect information from every faculty member in the
population of interest. Which is the most appropriate technique for gathering the needed data?
The first study was a controlled experiment, while the second was an observational study. -
CORRECT ANSWER In a study on the effect of exposure to insulation material on the risk of
lung cancer, the number of deaths from lung cancer occurring among 825 insulation plant workers
employed between 1941 and 1944 was compared to the number of deaths from lung cancer occurring
among 700 coworkers who did not work with insulation during the same time period. In a second
study, the medical records of 50 insulation plant workers who died of lung cancer were compared to
those of 100 coworkers who died free of lung cancer in order to assess if they worked with
insulation.Which one of the following statements is correct?
Discrete - CORRECT ANSWER Identify the given random variable as being qualitative or
quantitative (discrete or continuous).Years of education completed.
Height of USF students in centimeters - CORRECT ANSWER Which of the following comes
closest to a being quantitative (continuous) random variable?
Systematic sampling - CORRECT ANSWER Suppose that researchers are interested in
comparing average sugar intake among young adults (ages 18-35), middle-aged adults (ages 36-55)
and senior citizens (ages 56 and over) in Hillsborough County. To collect data, they consult a
Hillsborough County registry and randomly select 1,000 respondents from each age category to
receive a mail-in survey.
Identify the sampling technique used.
Body temperature (ºf) - CORRECT ANSWER Which one of the following is not a discrete
quantitative variable?
