Data analysis and application problems for inferential statistics

 For what types of data would you use nonparametric versus parametric statistics?

 Briefly describe the difference between internal and external validity.

 When a researcher has an accidental or convenience sample, what kind of population can he or she try to make inferences about?

 For each of the following lists of scores, indicate whether the value of SS will be negative, 0, between 0 and +15, or greater than +15. (You do not need to actually calculate SS.)

· Sample A: X = [103, 156, 200, 300, 98].

· Sample B: X = [103, 103, 103, 103, 103, 103].

· Sample C: X = [101, 102, 103, 102, 101].