1. Choosing a statistical What are you trying to do?

2. Describe a sample or population Measures of Central Tendency Mean, Median, Mode Measures of Dispersion Range, standard deviation

3. Infer about a population from a sample What level of data ? Interval Ordinal Nominal Chi Square Goodness of fit Nonparametric tests Infer about a population from a sample What level of data ? Interval Ordinal Nominal

4. Interval Ordinal Nominal Chi Square Goodness of fit

5. Interval Ordinal Nominal Nonparametric tests Mann Whitney U ( 2 samples) Kruskal Wallace H Test (3 or more samples)

6. Interval Ordinal Nominal Relationship or Difference ?

7. Relationship or Difference? Pearson r correlation 2 dependent variables

8. Relationship or Difference How many variables?

9. How many variables? One Variable Two Variables

10. One Variable or Two Variables 2 way ANOVA

11. One Variable or Two Variables How many groups?

12. One group Two groups More than two Groups

13. One group Two groups More than two Groups t test for single  is known  is unknown

14. One group Two groups More than two Groups t test for 2 samples independent samples or matched samples

15. One group Two groups More than two Groups One way ANOVA 3 or more levels of the ind. Var.