Graphs

• What are 5 ways of presenting quantitative data?


  1. In a table

  2. Bar charts

  3. Scattergrams

  4. Histograms

  5. Line graphs
• What is a scattergram?

  A type of graph that represents the strength and direction of a relationship between co-variables in a correlation analysis.

  
• What is a 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).

  
• What is a histogram?


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

  
• What is a line graph?


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

  
• What is a 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.

  
• What is a skewed distribution?


  A spread of frequency data that is not symmetrical, where the data clusters to one end.

  
• What is a 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 -> the mean isHIGHERthan the mode and median

  
• What is a 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 -> the mean isLOWERthan the mode and median