What is the purpose of a frequency table
Show how often each category of variable occurs
How to interpret bar graph
Bars go up to frequency that each category occured
How to interpret a histogram
Frequency of each value (x axis) is shown on y axis with each bar representing the frequency of scores between values
How to interpret a polygon
Frequency of each value (x axis) is represented by dots and connected by lines. See shape to determine distribution
When to use bar graph vs histogram vs polygon
Bar Graph: When there is discrete, categorical data
Histogram: When there is continuous, quantitative data
Polygon: When visualizing shape of quantitative data
What characteristics define the normal curve
A symetrical frequency distribution with the greatest frequency in the center and frequencies decreasing as one moves away from the center in either direction
