FETP June Course: Review of 20 June Learning

Overview Scales of measurement Visual display of quantitative information Questions

Types of data Nominal Ordinal Interval Ratio

Types of data Exposures: marital status, gender Outcome: Quality of life as measured by the “happiness” scale What type of variable is marital status (married, single, widowed, divorced)?

Types of data What type of variable is marital status (married, single, widowed, divorced)? Nominal

Types of data Exposures: marital status, gender Outcome: Quality of life as measured by the “happiness” scale

Types of data Exposures: marital status, gender Outcome: Quality of life as measured by the “happiness” scale What type of variable is gender? (male, female, khathooey)?

Types of data What type of variable is gender? Nominal

Types of data Exposures: marital status, gender Outcome: Quality of life as measured by the “happiness” scale What kind of outcome is happiness scale? (% of answers on a survey form)

Types of data What kind of outcome is happiness scale? (% of answers on a survey form) Interval

Types of data Exposures: BP, weight Outcomes: acute MI, angina, no cardiac events What type of variable is BP?

Types of data What type of variable is BP? Ratio

Types of data Exposures: BP, weight Outcomes: cardiac event status (acute MI, angina, no cardiac events) What type of variable is cardiac event status?

Attack Rate of Poultry Flock by Type Among Confirmed Flocks (n=25) Per 10,000 flocks