PBHL 3101 Chapter 2: Epi chapter 2
30 Jan 2017
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Chapter 2 epidemiologic measurements used to describe disease occurrence. Bar chart- type of graph that shoes the frequency of cases for categories of a categorical discrete variable such as yes or no. Histograms- are similar types of charts that are used to display the frequency distributions for grouped categories of a continuous variable. The x-axis is the independent variable while the y-varible is the dependent for line graphs. Continuous variable- is a variable that could have an infinite number of values along a continuum. If a variable can take on any value between two specified values, it is called a continuous variable; otherwise, it is called a discrete variable. Discrete or categorical would be how many times have you flipped a coin. Dichotomous data- consists of sub categories of categorical data. Only two values yes or no, absent or present, pregnant or not pregnant.
