Introduction to Statistics and Data Analysis
5th Edition
ISBN: 9781305115347
Author: Roxy Peck; Chris Olsen; Jay L. Devore
Publisher: Brooks Cole
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Textbook Question
Chapter 2.2, Problem 31E
The article “High Levels of Mercury Are Found in Californians” (Los Angeles Times, February 9, 2006) describes a study in which hair samples were tested for mercury. The hair samples were obtained from more than 6000 people who voluntarily sent hair samples to researchers at Greenpeace and The Sierra Club. The researchers found that nearly one-third of those tested had mercury levels that exceeded the concentration thought to be safe. Is it reasonable to generalize this result to the larger population of U.S. adults? Explain why or why not.
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Source: Centers for Disease Control and Prevention. [Vital Signs: binge Drinking among women and high school girls - United
States 2011]. MMWR 2013;62:pg 9-13. http://www.cdc.gov/mmwr/pdf/wk/mm6201.pdf
The article referenced says that when women aged 25-34 binge drink they have on average 7.2 drinks. I'm wondering if women in
Laramie are different than the national average. Assume the standard deviation is 0.42 drinks. I sample 9 women who have done
binge drinking, and their average is 5.1 drinks. Can I say at the 0.05 significance level that the average is not equal to 7.2?
Hg:X = 7.2
HA:X + 7.2
Ho:x + 7.2
HAix = 7.2
Ho:u - 5.1
Ho: = 7.2
Họ:* 5.1
Ho:u + 7.2
HA 5.1
HA:H 7.2
HA:H - 5.1
HA:H - 7.2
P-value
ODo not answer until you choose an a
ODo not answer until you choose an a
You cannot answer this until you choose an a
O You cannot answer this until you choose an a
The National Highway Traffic Safety Administration requires each U.S. state to carry out an observational study to assess the level of seat belt use in the state. One report
summarized data from a study done in a certain state. Unfortunately, the "sex" variable provided very little information, and only indicated that it collected the values Female
and Male; it may be that this refers to the gender identity of the respondent. The proportions in the accompanying table are based on observations of over 25,000 drivers and
passengers.
Male
Female
Uses Seatbelt
0.422
0.452
Does Not Use Seat Belt
0.078
0.048
Assume that these proportions are representative of adults in this state and that an adult from this state is selected at random.
(a) What is the probability that the selected adult uses a seat belt?
(b) What is the probability that the selected adult uses a seat belt given that the individual selected is male?
I need help with this question.
Chapter 2 Solutions
Introduction to Statistics and Data Analysis
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Ch. 2.1 - A survey of affluent Americans (those with incomes...Ch. 2.1 - Does living in the South cause high blood...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 - 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 “Popular Video Games:...Ch. 2.2 - Participants in a study of honesty in online...Ch. 2.2 - The report “Undergraduate Students and Credit...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 - Prob. 42ECh. 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 - Prob. 46ECh. 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 - Swedish researchers concluded that viewing and...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 - 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 - Is status related to a student’s understanding of...Ch. 2 - The article “Tots’ TV-Watching May Spur Attention...Ch. 2 - A study of more than 50,000 U.S. nurses found that...Ch. 2 - Prob. 71CRCh. 2 - The article Workers Grow More Dissatisfied in the...Ch. 2 - According to the article “Effect of Preparation...Ch. 2 - Prob. 74CRCh. 2 - Prob. 75CRCh. 2 - Researchers at the University of Houston decided...Ch. 2 - You have been asked to determine on what types of...Ch. 2 - A manufacturer of clay roofing tiles would like to...Ch. 2 - A mortgage lender routinely places advertisements...Ch. 2 - A tropical forest survey conducted by Conservation...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
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