Presentation of data

• Define 'bar chart'

  A type of graph in which the frequency of each variable is represented by the height of the bars
• Define 'histogram'

  A type of graph which shows frequency but the area of the bars represents frequency
• Define 'scattergram'

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

  A symmetrical spread of frequency that forms a bell shaped pattern. The mean, median and mode are all located at the highest peak.

  
• Define 'skewed distribution'

  A spread of frequency data that is not symmetrical, where the data clusters to one end
• Define 'positive skew'

  A type of frequency distribution in which the long tail is on the right side of the peak and most of the distribution is concentrated on the left

  
• Define 'negative skew'

  A type of frequency distribution in which the long tail is on the left side of the peak and most of the distribution is concentrated on the right