Assuming the tails of distributions are normal distribution, is there evidence that the treatment is effective?
DRAWING INFERENCES ABOUT POPULATION MEANS AND PROPORTIONS
A researcher conducts a test on the effectiveness of a cholesterol treatment on 114 total subjects. Assuming the tails of distributions are normal distribution, is there evidence that the treatment is effective?
Cholesterol Decreased No Cholesterol Decrease. Total
Treatment. 38. 18. 56
No treatment 30. 28. 58
Total 68. 46. 114
Submit a (2-3 pages) paper before the end of the module that:
Briefly describe the procedure for testing hypotheses.
Formulate the null and alternative hypotheses.
Determine the test statistic that you will use.
Calculate the p-value. Show your work.
Discuss whether there is enough evidence to reject the null hypothesis
Required Reading and Resources
Cook, A., Netuveli, G., & Sheikh, A. (2004). Chapters 5: Study design, Chapter 6: Combining students, Chapter 7: Managing data. In Basic skills in statistics: A guide for healthcare professionals(pp. 53-86). London, GBR: Class Publishing. eISBN: 9781859591291.
Norman, G. R., & Streiner, D. L. (2014). Section the second: Analysis of variance. Chapter 7: Comparing two groups. In Biostatistics: The bare essentials [4th ed., e-Book]. Shelton, Connecticut: PMPH-USA, Ltd. eISBN-13: 978-1-60795-279-4. Available in the Trident Online Library EBSCO eBook Collection.
Norman, G. R., & Streiner, D. L. (2014). Section the third: Regression and correlation. Chapter 13: Simple regression and correlation. In Biostatistics: The bare essentials [4th ed., e-Book]. Shelton, Connecticut: PMPH-USA, Ltd. eISBN-13: 978-1-60795-279-4. Available in the Trident Online Library EBSCO eBook Collection.
Norman, G. R., & Streiner, D. L. (2014). Section the fourth: Non-parametric statistics. Chapter 21: Tests of significance for categorical frequency data. In Biostatistics: The bare essentials [4th ed., e-Book]. Shelton, Connecticut: PMPH-USA, Ltd. eISBN-13: 978-1-60795-279-4. Available in the Trident Online Library EBSCO eBook Collection.
Additional Reading and Resources (Optional)
Bozeman Science (2011, November 13). Chi-squared test
. Retrieved from
Calvert, J. (2005). 2 by 2 contingency tables. Retrieved from http://mysite.du.edu/~jcalvert/econ/twobytwo.htm
McDonald, J. (2009). Chi-square test for goodness-of-fit. In Handbook of biological statistics[2nd ed.]. Sparky House Publishing: Baltimore, Maryland. Retrieved from http://www.biostathandbook.com/chigof.html
McDonald, J. (2009). Chi-square test of independence. In Handbook of biological statistics [2nd ed.]. Sparky House Publishing: Baltimore, Maryland. Retrieved from http://www.biostathandbook.com/chiind.html
Trochim, W. (2006). The t-test. Research Methods Knowledge Base. Retrieved from http://www.socialresearchmethods.net/kb/stat_t.php
Answer preview assuming the tails of distributions are normal distribution, is there evidence that the treatment is effective?
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