Biostatistics

Question 1

An example of a ___ variable is the number of teeth in a patient’s dentition.

Answer 1

discrete
obtained by counting and taking values from a set of distinct whole values

Question 2

___ variables are those that are assigned to an individual, unit, group, or category based on a qualitative property. An example is hair color.

Answer 2

Categorical

Question 3

An ___ variable is a variable that is manipulated by the researcher in an experimental study.

Answer 3

independent

Question 4

___ variables are numeric variables that are obtained by measuring and can, therefore, take any value between a certain set of real numbers.

Answer 4

Continuous
ceramic strength example

Question 5

___ is the accuracy of a diagnostic test in determining disease, while ___ is the accuracy of a diagnostic test in determining health.

Answer 5

Sensitivity
specificity

Question 6

___ studies are prospective, longitudinal, observational studies. The researcher records whether each participant is exposed or not, then tracks the participants over time to see if they develop the disease of interest.

Answer 6

Cohort

Question 7

The width of a confidence interval is ___ proportional to standard deviation and ___ proportional to sample size.

Answer 7

directly
inversely