Parametric Statistical Analysis


 Refers to the use of statistical tests or methods when the data being studied comes from a sample or population of people that is normally distributed.
 Assumes patient population being studied is normally distributed
 Assumes the variance is homogeneous
 Type of data: interval or ratio. Sometimes referred to as continuous variables/data.
 Interval scale data:
 When numbers have units that are of equal magnitude as well as rank order on a scale without an absolute zero
 Ratio scale data:
 When numbers have units that are of equal magnitude as well as rank order on a scale with an absolute zero
 The usual central measure is a mean
 Ttest (assumes 2 independent groups (i.e., not related) being studied)
 Oneway ANOVA (assumes > 2 independent groups being
studied/compared)
 Pearson (correlation test)
Definition
Characteristics
Example Methods