Introduction To Statistics And Data Analysis
Introduction To Statistics And Data Analysis
6th Edition
ISBN: 9781337793612
Author: PECK, Roxy.
Publisher: Cengage Learning,
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Chapter 2.3, Problem 37E

According to the article “Rubbing Hands Together Under Warm Air Dryers Can Counteract Bacteria Reduction” (Infectious Disease News, September 22, 2010) washing your hands isn’t enough—good “hand hygiene'' also includes drying hands thoroughly. The article described an experiment to compare bacteria reduction for three different hand-drying methods. In this experiment, subjects handled uncooked chicken for 45 seconds, then washed their hands with a single squirt of soap for 60 seconds, and then used one of the three hand-drying methods. After completely drying their hands, the bacteria count on their hands was measured.

Suppose you want to carry out a similar experiment and that you have 30 subjects who are willing to participate. Describe a method for randomly assigning each of the 30 subjects to one of the hand-drying methods. (Hint: See A Note on Random Assignment on page 50.)

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Chapter 2 Solutions

Introduction To Statistics And Data Analysis

Ch. 2.1 - A survey of adult Americans who are Internet users...Ch. 2.1 - Does sitting for long periods of time hurt your...Ch. 2.2 - A New York psychologist recommends that if you...Ch. 2.2 - As part of a curriculum review, a psychology...Ch. 2.2 - A petition with 500 signatures is submitted to a...Ch. 2.2 - The article Bicyclists and Other Cyclists (Annals...Ch. 2.2 - The article Teenage Physical Activity Reduces Risk...Ch. 2.2 - For each of the situations described, state...Ch. 2.2 - Of the 6500 students enrolled at a community...Ch. 2.2 - Briefly explain why it is advisable to avoid the...Ch. 2.2 - A sample of pages from this book is to be...Ch. 2.2 - The chairman of a California ballot initiative...Ch. 2.2 - The authors of the paper Digital Inequality:...Ch. 2.2 - The 2013 National Study of Substance Use Habits of...Ch. 2.2 - The paper Deception and Design: The Impact of...Ch. 2.2 - The authors of the paper Playing by the Rules:...Ch. 2.2 - Participants in a study of honesty in online...Ch. 2.2 - The article Credit Card Activity for College...Ch. 2.2 - The financial aid advisor of a university plans to...Ch. 2.2 - Suppose that you were asked to help design a...Ch. 2.2 - The article High Levels of Mercury Are Found in...Ch. 2.2 - Whether or not to continue a Mardi Gras Parade...Ch. 2.3 - The head of the quality control department at a...Ch. 2.3 - A study of college students showed a temporary...Ch. 2.3 - According to the article Rubbing Hands Together...Ch. 2.3 - The following is from an article titled After the...Ch. 2.3 - The report Comparative Study of Two Computer Mouse...Ch. 2.3 - The Institute of Psychiatry at Kings College...Ch. 2.3 - In an experiment to compare two different surgical...Ch. 2.3 - In many digital environments, users are allowed to...Ch. 2.3 - Does playing action video games provide more than...Ch. 2.3 - Construct a diagram to represent the note-taking...Ch. 2.3 - Construct a diagram to represent the gasoline...Ch. 2.3 - An advertisement for a sweatshirt that appeared in...Ch. 2.3 - The paper Turning to Learn: Screen Orientation and...Ch. 2.3 - Consider the study described in the previous...Ch. 2.3 - The Pew Research Center conducted a study of...Ch. 2.3 - Consider the study described in the previous...Ch. 2.3 - Red wine contains flavonol, an antioxidant thought...Ch. 2.4 - Explain why some studies include both a control...Ch. 2.4 - Explain why blinding is a reasonable strategy in...Ch. 2.4 - Give an example of an experiment for each of the...Ch. 2.4 - The article Study Points to Benefits of Knee...Ch. 2.4 - In an experiment to compare two different surgical...Ch. 2.4 - The article Placebos Are Getting More Effective....Ch. 2.4 - The article Yes That Miley Cyrus Biography Helps...Ch. 2.4 - Suppose that the researchers who carried out the...Ch. 2.4 - The article Doctor Dogs Diagnose Cancer by...Ch. 2.4 - Pismo Beach, California, has an annual clam...Ch. 2.4 - The San Luis Obispo Tribune (May 7, 2002) reported...Ch. 2.4 - The article A Debate in the Dentists Chair (San...Ch. 2.5 - The article Effects of Too Much TV Can Be Undone...Ch. 2.5 - Prob. 66ECh. 2 - A mortgage lender routinely places advertisements...Ch. 2 - The article Rethinking Calcium Supplements (US...Ch. 2 - A pollster for the Public Policy Institute of...Ch. 2 - A study in Florida is examining whether health...Ch. 2 - The press release Men Need to Man Up, According to...Ch. 2 - A news release from Intel Intels Security...Ch. 2 - USA TODAY (August 25, 2015) reported that American...Ch. 2 - The paper Effect of a Nutritional Supplement on...Ch. 2 - A manufacturer of clay roofing tiles would like to...Ch. 2 - A tropical forest survey conducted by Conservation...
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