Nsg 522 Midterm Study Guide Rated A+

What does epidemiology focus on? {Ans: Populations and population health}What is a variable? {Ans: Thing that is being measured A variable can assume different values}When is a parametric procedure used? {Ans: Can only be used when all of the following conditions are met: interval or ratio level data -or- data are normally distributed -and- absence of outliers}What is a ordinal variable? {Ans: Categorical variable Data is classified into mutually exclusive categories Categories can be ranked Descriptive statistics: frequencies, percentages, histogram Ex. Letter grades in course, ranking in race, cancer stages, number of children}What is an identifier in a data file? {Ans: Neutral or non-personal number First column in a data file contains case identifier Not a variable}What are the 5 W's of epidemiology? {Ans: What? When? Where? Who? Why? How?}