Mann Whitney U stats test

• What type of test is Mann-Whitney?

  Test of Difference
• What type of experimental method is Mann-Whitney?

  Unrelated
• What level of data is required for Mann-Whitney?

  Ordinal
• What are the 7 steps of Mann-Whitney?

  1. Plot the data table
  2. Rank each condition together
  3. Calculate the total of each condition
  4. Calculate the total of each U value using the formula
  5. Use the smaller U value - this is the observed value
  6. Find the criticl value using the critical value table
  7. Conclude
• What is the formula for Mann Whitney?

  $U1\ =$$R1\ -\frac{n1\left(n1+1\right)}{2}$

  $or\ U2=$$R2-\frac{n2\left(n2+1\right)}{2}$
• What does N stand for in Mann Whitney?

  N1 and N2= Number of participants in each group
• When is Mann Whitney significant?

  When the observed value is less than or equal to the critical value