Biostatistics IV supplemental Flashcards
check on learning
Labels
No order information
Nominal
Only two possible labels
No order information
Dichotomous (a special case of Nominal)
Order (rank) information is maintained
Differences/ratios do not make sense
Ordinal
Possible values are integers
Have acountablenumber of values
Discrete
Can have any value in a range
Continuous
No absolute zero exists
Differences make sense but not ratios
Only permits addition and subtraction
Interval
Zero represents a true absence
Ratios make sense
ratio
Blood type
Occupation
Nominal
Test result: Positive/Negative
Dichotomous (a special case of Nominal)
Likert scale questions
Academic Tier
Ordinal
Number of patients who were exposed to a risk factor
Number of patients who visited ER during last weekend
Discrete
Amount of time between meal being served and onset of gastro-intestinal symptoms
Infant mortality rate
Continuous
Temperature in Celsius/Fahrenheit scale
IQ score (most standardized tests scores in psychology)
Interval
Temperature in Kelvin scale
Salary in $
Weight
Risk and proportion
Ratio
