1. STATISTICS & HYPOTHESIS TESTING PRESENTATION Tiesha Amison, Lorraine Lorentz, Vicky Mintz, Diana Morris and Trish Zimmerer BSHS/382 November 24, 2014 Angela Heads

2. INTRO  ◦Introduce the Learning Team members and the data set.

3. INTRO  ◦Briefly explain how the data was gathered and identify the study population.

4. DESCRIPTIVE STATISTICS

5.  ◦Explain how descriptive statistical analysis increases understanding of the data.

6. DESCRIPTIVE STATISTICS  ◦Include an original graph created with StatCrunch that uses at least one descriptive statistical measure to illustrate the data set.

7. INFERENTIAL STATISTICS  ◦Define statistical inference and include and explain at least one original inferential statistical calculation.

8. INFERENTIAL STATISTICS  Use StatCrunch to check the calculation and show the steps in your presentation.

9. INFERENTIAL STATISTICS  ◦Explain how inferential statistical analysis increases understanding of the data.

10. NULL HYPOTHESIS TESTING The null hypothesis assumes sample observations are purely chance States there is no relationship between two or more variables Symbolized H o The alternative hypothesis assumes there is an effect of the variables Symbolized H a NULL HYPOTHESIS FOR THE ENCHILADA DATA SET  H o : cost of enchiladas & sodium content are independent  H a : cost of enchiladas & sodium content are dependent

11. LOGIC OF NULL HYPOTHESIS TESTING  Initially presume null hypothesis is true  Determine likeliness of sample relationship  Perform statistical tests to measure relatedness  If the sample relationship is unlikely reject the null hypothesis (Psychology Research Methods, 2012)

12. IMPLICATIONS FOR FUTURE RESEARCH  ◦Differentiate between descriptive and inferential statistics and how they support the human services research process.

13. IMPLICATIONS FOR FUTURE RESEARCH-NULL HYPOTHESIS  H o : Sodium content and taste are independent  H a : Sodium content and taste are dependent

14. IMPLICATIONS FOR FUTURE RESEARCH  ◦Provide an example of a study that is a logical follow-up to your data set that yields useful inferential statistics.

15. IMPLICATIONS FOR FUTURE RESEARCH  ◦Provide an example of a null hypothesis inspired by your data set that adds to the human services community’s knowledge.

16. REFERENCES

17. Agresti, A., & Franklin, C. (2009). Statistics: The art and science of learning from data (2nd ed.). Retrieved from The University of Phoenix eBook Collection. Psychology research methods: core skills and concepts (v.1.0). Retrieved from http://2012books.lardbucket.org/books/psychology-research-methods-core- skills-and-concepts/s17-01-understanding-null-hypothesis-.html http://2012books.lardbucket.org/books/psychology-research-methods-core- skills-and-concepts/s17-01-understanding-null-hypothesis-.html Rosnow, R.L., & Rosenthal, R. (2008). Beginning behavioral research: A conceptual primer. Retrieved from The University of Phoenix eBook Collection.