spearman's rank

• how do you rank data

  smallest value = number 1 rank
• if you have two data values the exact same

  15, 22, 22, 37

  15 would be rank 1

  both 22 would be rank 2.5

  and 37 would be rank 4
• closer to +1

  strong positive correlation
• N in the equation

  number of data sets

  for example: 15, 22, 22, 37

  N would be 4
• critical value

  you just use the value of N