PUBH 6003 QUIZ 3 CERTIFICATION
EVALUATION QUESTIONS ANSWERS
COMPLETE SOLUTION VERIFIED PASS
●● For which of the following criteria do epidemiologists need to
observe the cause before the effect?
Answer: Temporality
●● Assume researchers are trying to find out the mean concentration
levels of a specific drug in a population of individuals' blood during a
clinical trail. The researchers find that the sample population (n=100)
has a mean concentration of 6.7 mcg/mL with a standard deviation of 1.3
mcg/mL. Calculate a 95% confidence interval for the mean
concentration level of the medication for the population's blood and
interpret it.
Answer: The researchers are 95.0% confident the true mean
concentration of medication in the population's blood is between
6.445mcg/ml and 6.955 mcg/ml
●● Assume a researcher wants to compare the mean Alanine
Aminotransferase (ALT) levels in two populations, individuals who
drink alcohol and individuals who do not drink alcohol. The mean ALT
levels for the individuals who do not drink alcohol is 32 with a standard
deviation of 14, and 37 individuals were in the sample. The mean ALT
levels for individuals who drink alcohol is 69 with a standard deviation
of 19, and 38 individuals were in the sample. Construct and interpret a
EVALUATION QUESTIONS ANSWERS
COMPLETE SOLUTION VERIFIED PASS
●● For which of the following criteria do epidemiologists need to
observe the cause before the effect?
Answer: Temporality
●● Assume researchers are trying to find out the mean concentration
levels of a specific drug in a population of individuals' blood during a
clinical trail. The researchers find that the sample population (n=100)
has a mean concentration of 6.7 mcg/mL with a standard deviation of 1.3
mcg/mL. Calculate a 95% confidence interval for the mean
concentration level of the medication for the population's blood and
interpret it.
Answer: The researchers are 95.0% confident the true mean
concentration of medication in the population's blood is between
6.445mcg/ml and 6.955 mcg/ml
●● Assume a researcher wants to compare the mean Alanine
Aminotransferase (ALT) levels in two populations, individuals who
drink alcohol and individuals who do not drink alcohol. The mean ALT
levels for the individuals who do not drink alcohol is 32 with a standard
deviation of 14, and 37 individuals were in the sample. The mean ALT
levels for individuals who drink alcohol is 69 with a standard deviation
of 19, and 38 individuals were in the sample. Construct and interpret a
