Learning Materials
Features
Discover
Chapter 1: Problem 12
True or False: Both discrete and continuous variables are quantitative variables.
Over 30 million students worldwide already upgrade their learning with 91影视!
These are the key concepts you need to understand to accurately answer the question.
All the tools & learning materials you need for study success - in one app.
Get started for free
Read the newspaper article and identify (a) the research question the study addresses, (b) the population, (c) the sample, \((d)\) the descriptive statistics, and (e) the inferences of the study. Study: Exercise May Prevent Parkinson's By Kathleen Fackelmann, USA Today Men who engaged in regular, vigorous exercise as teens and young adults drastically cut their risk of developing Parkinson's disease later in life, a study reports Tuesday. As many as 1 million people in the USA, including actor Michael J. Fox, have this progressive neurological disease, which commonly strikes after age \(50 .\) In addition to suggesting that exercise could ward off the disease, the findings also raise the hope that physical activity might help hold the line on brain cell destruction in people who already have it.Robin Elliott, executive director of the Parkinson's Disease Foundation in New York, said the study is promising because there is no cure for Parkinson's. Doctors today have no way to stop or delay the progression of the disease, which affects the brain region that controls movement. Common symptoms of Parkinson's are tremors and a shuffling gait. Researcher Alberto Ascherio of the Harvard School of Public Health and his colleagues studied 48,000 men and 77,000 women who were relatively healthy and middle-aged or older at the study's start. Over the course of the study, 387 people developed the disease. The team did a statistical analysis to look for a link between physical activity and the risk of Parkinson's. Men who said they jogged, played basketball or participated in some other vigorous activity at least twice a week in high school, college and up to age 40 had a \(60 \%\) reduced risk of getting Parkinson's, says the study, which was published today in Neurology. The team found no such protection for women. But the women in this study came of age in the '50s and '60s, an era when young women did not have as many opportunities to participate in sports. Ascherio says. The study had so few female athletes that any protection may have been missed, he says. This study's findings are supported by animal research: Michael Zigmond, a researcher at the University of Pittsburgh and his colleagues have reported that exercise protects rats from developing a Parkinson's-like disease. No one knows for certain whether exercise can prevent or delay the symptoms of Parkinson's in humans. But there is plenty of evidence suggesting that a regular fitness regimen might ward off a host of ailments as diverse as heart disease and Alzheimer's. That leads experts such as Zigmond to recommend a vigorous workout on most days of the week. "We know that exercise is good for you in ways that go beyond any one condition."
Research the origins of the Gallup Poll and the current sampling method the organization uses. Report your findings to the class.
An article in the Los Angeles Times (Sept. 21,1996) reported that results of Bosnian elections the previous week were suspect because an independent watchdog agency, International Crisis Group, estimated that voter turnout was \(106.7 \% .\) Why do you think the agency was concerned?
The survey design is flawed. (a) Determine whether the flaw is due to the sampling method or the survey itself For flawed surveys, identify the cause of the error (wording of question, nonresponse, and so forth). (b) Suggest a remedy to the problem. The owner of a shopping mall wishes to expand the number of shops available in the food court. She has a market researcher survey mall customers during weekday mornings to determine what types of food the shoppers would like to see added to the food court.
Determine whether the quantitative variable is discrete or continuous. Runs scored in a season by Albert Pujols
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Flashcards 
91影视 AI 
Notes 
Study Plans 
Study Sets 
Find a degree 
Magazine