Math: Arithmetic Means of a Sequence

• Arithmetic means


  Terms between any two terms in an arithmetic sequence
• Inserting arithmetic means between two terms

  1. Find common difference using n-term formula

  2. Add common difference to first term to get next arithmetic mean
• Arithmetic mean


  Average of a set of numbers
• Calculating arithmetic mean


  Sum of all values divided by number of values
• Arithmetic mean between two numbers

  • 8 and 20 -> 14
  • -5 and 7 -> 1
• Dominic's scores in 5 math tests: 94, 90, 96, 93, 95
• Dominic's average score is 93.6
• Dominic's scores in 4 math tests: 88, 86, 87, 84
• Dominic's average score is 86.25