Here are some of the questions that need to be answered when choosing the appropriate inferential procedure:

. Are you comparing groups or sets of scores? Are you correlating variables?

. What is the level of measurement of the variables (nominal, ordinal, or interval/ratio)?

. How large are the groups (sample size)?

 How many groups or sets of scores are being compared?

. Are the observations or scores dependent or independent?

. How many observations are available for each group?