AgainstAllOdds_FacultyGuide_Unit15.pdf

# Using excels random number generator rand the names

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Subjects’ names have been bolded in the table below. Using Excel’s random number generator Rand() The names were entered into a column. In a second column 40 random numbers were generated. Then the names were sorted by the value of their associated random number. The bolded names in the table will be selected to receive the drug. The remaining 20 subjects will receive the placebo. 4. a. This is a double-blind experiment. Neither Dr. Colman, who is conducting the experiment, nor his patients know whether they are getting the remedy or the placebo. b. In this case, both the person who conducted the experiment and the participants know which type of soda they are drinking. So this is not an example of either a single-blind or a double-blind experiment. c. Since Janet labeled the cakes, she knows which is which. Her friends do not know which cake is made using cocoa and which using baking chocolate. Hence, this is a single-blind experiment. 01 Abrams 09 Daniels 17 Halsey 25 Lippman 33 Rosen 02 Adamson 10 Durr 18 Howard 26 Martinez 34 Solomon 03 Afifi 11 Edwards 19 Hwang 27 McNeill 35 Thompson 04 Brown 12 Fluharty 20 Iselin 28 Morse 36 Travers 05 Cansico 13 Garcia 21 Janle 29 Ng 37 Turner 06 Chen 14 Gerson 22 Kaplan 30 Obramowitz 38 Ullman 07 Cranston 15 Green 23 Krushchev 31 Rivera 39 Williams 08 Curzakis 16 Gutierrez 24 Lattimore 32 Roberts 40 Wong Janle Afifi Travers Kaplan Roberts Solomon Abrams Daniels McNeil Cansico Rivera Obramowitz Ng Durr Garcia Brown Gutierrez Lattimore Turner Curzakis Morse Ullmann Thompson Krushchev Hwang Gerson Adamson Cranston Edwards Iselin Williams Lippman Martinez Howard Fluharty Chen Rosen Halsey Green Wong

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Unit 15: Designing Experiments | Faculty Guide | Page 6 Review Questions Solutions 1. a. The response variable is not given explicitly, so students must specify what response they will measure. The grade on the essay is a reasonable choice, but there may be other good choices. Here is the outline of the design. b. Sample answer: The essays should be read and graded by the same person (or two people – and scores averaged). More importantly, the experiment should be double-blind: the person reading the essays must not know which were word-processed. This means that all essays have to be retyped in the same form before being graded, so that only the quality of the essay influences the grade.
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