Wednesday, June 13, 2012

Exam Notes

  • Variable: an unknown number.
  • Expressions contain variables, operations (+, -, x, ÷), and numbers, in any combination. (there is no equals sign = in an expression)

  • Mean: add up all the values and divide by how many values there are.
  • Median: the middle number in a set of ordered values, might be the mean of two middle values.
  • Mode: the value that shows up the most. 
  • Range: positive difference between largest and smallest values.
  • Outlier: values too big or small compared to other values. 

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