Skewed distributions

• Explain normal distribution

  Data that is normally distributed produces a symmetrical bell-shaped curve when plotted, indicating that most scores are close to the mean, with a progressively fewer scores being located at the extremes of either tail of the distribution.

  
• What happens when the data does not follow a symmetrical pattern?

  Can results in a large proportion of scores falling below the mean (positively skewed) or after the mean (negatively skewed)