Shingles A research doctor has discovered a new ointment that she believes will be more effective than the current medication in the treatment of shingles (a painful skin rash). Eight patients have volunteered to participate in the initial trials of this ointment. You are the statistician hired as a consultant to help design a completely randomized experiment. a) Describe how you will conduct this experiment. b) Suppose the eight patients last names start with the letters A to H. Using the random numbers listed below, show which patients you will assign to each treatment. Explain your randomization procedure clearly. 41098 18329 78458 31685 55259 c) Can you make this experiment double-blind? How? d) The initial experiment revealed that males and females may respond differently to the ointment. Further testing of the drugs effectiveness is now planned, and many patients have volunteered. What changes in your first design, if any, would you make for this second stage of testing?

STAT-5615: Statistics in Research I Lecture 3 Graphical Procedures & Summary Statistics Ott & Longnecker Chapter 3 Dr. Christian Lucero Virginia Tech Fall 2016 Explaratory Data Analysis (EDA) I EDA is a set of techniques used to explore and summarize data via graphical and numerical methods. I Graphical Techniques (including but not limited to) I Pie charts (not covered in class, please read) I Bar charts I Histograms I Stem-and-Leaf plots (not covered in class, please read) I Time series plots I Boxplots I Numerical Descriptive Techniques I