Graphs

• 5 main ways of displaying quantitative data


  -tables

  -bar chart

  -histogram

  -line graph

  -scattergram
• bar chart


  a type of graph in which the frequency of each variable is represented by the height of the bars- used for discrete data (categorical or nominal)
• histogram


  a type of graph in which continuous data is represented. similar to bar chart, except the bars touch each other.
• line graph


  a type of graph which represents continuous data and use points connected by lines to show how something changes in value
• scattergram


  a type of graph that represents the strength and direction of a relationship between co-variables in a correlational analysis
• normal distribution


  a symmetrical spread of frequency data that forms a bell-shaped pattern- mean, median and mode are all located at the highest peak
• positive skew


  a type of distribution in which the long tail is on the positive (right) side of the peak and most of the distribution is concentrated on the left
• negative skew


  a type of distribution in which the long tail is on the negative (left) side of the peak and most of the distribution is concentrated on the right