research question and determine how that question might best be analyzed

In this discussion, you will evaluate a research question and determine how that question might best be analyzed.  To do this, you will need to identify the appropriate application of course specified statistical tests, examine assumptions and limitations of course specified statistical tests, and communicate in writing critiques of statistical tests.

A researcher wishes to study the effect of a new drug on blood pressure.  Consider and discuss the following questions as you respond:

  • Would you recommend using a      z-test, a t-test, or an ANOVA for the analysis?  Explain your answer.
  • What would your choice of test      depend on?  For the test you select, explain your design and your      comparison groups.
  • Would the hypothesis be      directional or non-directional?
  • Would the test be one-tailed or      two-tailed?
  • What would be the null and what      would be the alternative hypothesis?

Aman, M. G., Hollway, J. A., McDougle, C. J., Scahill, L., Tierney, E., McCracken, J. T., . . . Posey, D. J. (2008). Cognitive effects of risperidone in children with autism and irritable behavior. Journal of Child and Adolescent Psychopharmacology, 18(3), 227-236. doi:http://dx.doi.org/10.1089/cap.2007.0133. Retrieved from the ProQuest database.

  • This is an article on Autism      that uses ANOVA as the main type of statistical analysis.  This      article is necessary to complete the assignment for this week.

Article

Statgraphics Centurion. (2006).Analysis of variance (Links to an external site.)Links to an external site.. Retrieved from http://www.statgraphics.com/analysis_of_variance.htm

  • This        interactive website describes in detail how to use several types of        ANOVA. It also includes examples and graphical displays.

Websites

VassarStats: Website for Statistical Computation (Links to an external site.)Links to an external site.. (http://vassarstats.net)

  • This is a        website includes tools to calculate many of the statistical tests we        cover in this course including t-tests,        ANOVA, correlation, and regression.  Each calculator includes a        tutorial and/or walkthrough.

Web Center for Social Research Methods (Links to an external site.)Links to an external site.. (http://socialresearchmethods.net)

  • This        website includes links to numerous tools and tutorials relating to        statistical concepts, calculations, and scale development.

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