STATISTICS & HYPOTHESIS TESTING PRESENTATIONTiesha Amison, Lorraine Lorentz, Vicky Mintz, Diana Morris and Trish Zimmerer

BSHS/382

November 24, 2014

Angela Heads

INTRO

◦Introduce the Learning Team members and the data set.

INTRO

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

DES

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TATIS

TIC

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DESCRIPTIVE STATISTICS

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

DESCRIPTIVE STATISTICS

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

•INFERENTIAL STATISTICS

◦Define statistical inference and include and explain at least one original inferential statistical calculation.

INFERENTIAL STATISTICS

Use StatCrunch to check the calculation and show the steps in your presentation.

INFERENTIAL STATISTICS

◦Explain how inferential statistical analysis increases understanding of the data.

NULL HYPOTHESIS TESTING

• The null hypothesis • assumes sample observations are

purely chance

• States there is no relationship between two or more variables

• Symbolized Ho

• The alternative hypothesis • assumes there is an effect of the

variables

• Symbolized Ha

NULL HYPOTHESIS

FOR THE ENCHILADA DATA SET

Ho: cost of enchiladas & sodium content are independent

Ha: cost of enchiladas & sodium content are dependent

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)

•IMPLICATIONS FOR FUTURE RESEARCH

◦Differentiate between descriptive and inferential statistics and how they support the human services research process.

•IMPLICATIONS FOR FUTURE RESEARCH-NULL HYPOTHESIS

Ho: Sodium content and taste are independent

Ha: Sodium content and taste are dependent

•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.

•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.

REFERENCES

REFERENCESAgresti, 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

Rosnow, R.L., & Rosenthal, R. (2008). Beginning behavioral research: A conceptual primer. Retrieved from The University of Phoenix eBook Collection.