Measure of Location

• Mean -

  Sum of values ÷number of values

  Eg. 5,6,7,8,4

  Mean= 30÷5=6
• Median-

  Middle value when the numbers are in numerical order

  Eg. 5,6,7,8,4

  4,5,6,7,8

  Median= 6
• Mode -

  Most common number

  Eg. 5,6,7,8,4,4

  4 is the most common

  Mode= 4
• Range-

  Largest value - smallest value

  5,6,7,8,4

  8-4=4

  Range=4

  Ps. Range is not an average it shows conscitency
• The midpoint of the age group is used to represent it as we don't know the exact age of each person from the table
• Averages from a grouped frequency table