Questions and Answers of Statistics The Art and Science

An article in the Journal of American College Health reports that, in a survey of 1845 college students from a large, southeastern public university, 27% were at risk for at least one sleep disorder,
The General Social Survey asked, in 2012, whether you would commit suicide if you had an incurable disease. Of the 3112 people who had an opinion about this, 1862, or 59.8%, would commit suicide.a.
Refer to Activity 2 on page 21.a. Repeat the activity using a population proportion of 0.60: Take at least five samples of size 10 each; observe how the sample proportions of successes vary around
A study published in 2010 in The New England Journal of Medicine investigated the effect of financial incentives on smoking cessation. As part of the study, 878 employees of a company, all of whom
The following table shows the result of the 2012 presidential election along with the vote predicted by several organizations in the days before the election. The sample sizes were typically about
Consider the population of all students at your school. A certain proportion support mandatory national service (MNS) following high school. Your friend randomly samples 20 students from the school
The figure shown is a graph published by Statistics Sweden. It compares Swedish society in 1750 and in 2010 on the numbers of men and women of various ages, using age pyramids. Explain how this
The Voice of the People poll asks a random sample of citizens from different countries around the world their opinion about global issues. Included in the list of questions is whether they feel that
The General Social Survey in 2012 asked whether we should allow antireligious books in the library. Of the 3077 people who responded, 23% said they should be removed. Identify (a) The

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