the sign test

• when and how to use the sign test

  -used when looking for a difference between paired data (repeated measures or matched pairs) which generated nominal data
• how to work out the sign test

  1. is the hypothesis directional or non-directional
  2. work out the sign - (+ or - or 0)
  3. calculate the value of S (add up the number of pluses and minuses and selecting the smaller value)
  4. calculate the value of N (total number of scores minus any 0 scores
  5. find the critical value
  6. determine whether the results are significant, the calculated value must be equal or less than the critical value
  7. draw a conclusion