descriptive statistics

• strength and limitation of mean

  1. most sensitive - takes account all values
  2. easily distorted by extreme values
• strength and limitation of median

  1. not effected by extreme scores
  2. less sensitive - not all values included
• strength and limitation of mode

  1. most useful for nominal data
  2. not always representative
• strength and limitation of range

  1. easy to calculate
  2. only takes account two values