Essentials of Modern Business Statistics with Microsoft Office Excel (Book Only)
7th Edition
ISBN: 9781337298353
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams
Publisher: South-Western College Pub
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Chapter 1, Problem 23SE
Pew Research Center is a nonpartisan polling organization that provides information about issues, attitudes, and trends shaping America. In a poll, Pew researchers found that 73% of teens aged 13-17 have a smartphone, 15% have a basic phone and 12% have phone. The study also asked the respondents how they communicated with their closest friend. Of those with a smartphone, 58% responded texting, 17% social media and phone calls. Of those with no smartphone, 25% responded texting, 29% social media and 21 % phone calls. (Pew Research Center website, October 2015).
a. One statistic (58%) concerned the use of texting to contact his/her closest friend, if the teen owns a smartphone. To what population is that applicable?
b. Another statistic (25%) concerned the use of texting by those who do not own a smart-phone. To what population is that applicable?
c. Do you think the Pew researchers conducted a census or a sample survey to obtain their results? Why?
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Pew Research Center is a nonpartisan polling organization that provides information about issues, attitudes, and trends shaping America. In a poll, Pew researchers found that 73% of teens aged 13–17 have a smartphone, 15% have a basic phone and 12% have no phone. The study also asked the respondents how they communicated with their closest friend. Of those with a smartphone, 58% responded texting, 17% social media and 10% phone calls. Of those with no smartphone, 25% responded texting, 29% social media and 21% phone calls.†
Do you think the Pew researchers conducted a census or a sample survey to obtain their results? Why?
Pew Research conducted a sample survey. A census would not have provided realistic information on such a large population.
Pew Research conducted a census. A sample survey would not have provided realistic information on such a large population.
Pew Research conducted a census. It would not have been practical to conduct a sample survey on such a large…
In a poll conducted March 17-21, 2005, by the Pew Research Center for the People and the
Press, a simple random sample of 1505 American adults were asked whether they were in favor
of tighter enforcement of government rules on TV content during hours when children are most
likely to be watching. Of the 1505 adults, 1129 responded yes.
1. What proportion of those surveyed were in favor of tighter enforcement of government
rules on TV content during hours when children are most likely to be watching?
2. Obtain a 95% confidence interval for the proportion of Americans who are in favor of
tighter enforcement of government rules on TV content during hours when children are
most likely to be watching. (Round the final answer to four decimal places).
P(1-p)
CI = ptz
3. Interpret the confidence interval.
4. What proportion of those surveyed were in favor of tighter enforcement of government
rules on TV content during hours when children are most likely to be watching when we
apply the…
A study was conducted to explore the prevalence and impact of sleep problems on various aspects of people's lives. Staff from a university in Melbourne, Australia were invited to complete a questionnaire containing questions about their sleep behaviour (e.g. hours slept per night), sleep problems (e.g. difficulty getting to sleep) and the impact that these problems have on aspects of their lives (work, driving, relationships). The sample consisted of 271 respondents (55% female, 45% male) ranging in age from 18 to 84 years (M=43.9yrs). A student researcher is interested in examining whether the participants in the study sleep for 8 hours a night, the recommended average for adults.
1. Proposed analysis and why you chose the analysis
2. Measurement type (i.e., nominal, ordinal, continuous) for variable(s) that will be used in the analysis
3. Null and alternative hypotheses (based on context of study) in symbols
4. Test assumptions and make a decision (please provide written evidence to…
Chapter 1 Solutions
Essentials of Modern Business Statistics with Microsoft Office Excel (Book Only)
Ch. 1 - Discuss the differences between statistics as...Ch. 1 - Tablet PC Comparison provides a wide variety of...Ch. 1 - Refer to Table 1. 6. a. What is the average cost...Ch. 1 - Table 1. 7 shows data for eight cordless...Ch. 1 - Refer to the data set in Table 1. 7. a. What is...Ch. 1 - J D. Power and Associates surveys new automobile...Ch. 1 - The Kroger Company is one of the largest grocery...Ch. 1 - The Tennessean, an online newspaper located in...Ch. 1 - The Commerce Department reported receiving the...Ch. 1 - The Bureau of Transportation Statistics Omnibus...
Ch. 1 - In a Gallup telephone survey conducted on April...Ch. 1 - The Hawaii Visitors Bureau collects data on...Ch. 1 - Figure 1. 10 provides a bar chart showing the...Ch. 1 - The following data show the number of rental cars...Ch. 1 - The U. S. Census Bureau tracks sales per month for...Ch. 1 - The Energy Information Administration of the U. S....Ch. 1 - A manager of a large corporation recommends a...Ch. 1 - A random telephone survey of 1021 adults (aged 18...Ch. 1 - A Bloomberg Businessweek North American subscriber...Ch. 1 - A survey of 131 investment managers in Barron 's...Ch. 1 - A seven-year medical research study reported that...Ch. 1 - A survey conducted by Better Homes and Gardens...Ch. 1 - Pew Research Center is a nonpartisan polling...Ch. 1 - A sample of midterm grades for five students...Ch. 1 - Table 1. 8 shows a data set containing information...
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- A study was conducted to explore the prevalence and impact of sleep problems on various aspects of people's lives. Staff from a university in Melbourne, Australia were invited to complete a questionnaire containing questions about their sleep behaviour (e.g. hours slept per night), sleep problems (e.g. difficulty getting to sleep) and the impact that these problems have on aspects of their lives (work, driving, relationships). The sample consisted of 271 respondents (55% female, 45% male) ranging in age from 18 to 84 years (M=43.9yrs). A student researcher is interested in examining whether the participants in the study sleep for 8 hours a night, the recommended average for adults. Proposed analysis and why you chose the analysis? Measurement type (i.e., nominal, ordinal, continuous) for variable(s) that will be used in the analysis? Null and alternative hypotheses (based on context of study) in symbols? id sex age weight height sleep 83 0 42 52 162 9…arrow_forwardA study was conducted to explore the prevalence and impact of sleep problems on various aspects of people's lives. Staff from a university in Melbourne, Australia were invited to complete a questionnaire containing questions about their sleep behaviour (e.g. hours slept per night), sleep problems (e.g. difficulty getting to sleep) and the impact that these problems have on aspects of their lives (work, driving, relationships). The sample consisted of 271 respondents (55% female, 45% male) ranging in age from 18 to 84 years (M=43.9yrs). A student researcher is interested in examining whether the participants in the study sleep for 8 hours a night, the recommended average for adults. id sex age weight height sleep 83 0 42 52 162 9 294 0 54 65 174 7 425 1 89 170 8 64 0 41 66 178 8 536 0 39 62 160 7.5 57 0 66 62 165 8 251 0 36 62 165 8 255 0 35 75 174 7 265 1 90 180 8 290 1 41 75 187 7 418 1 70 7.5 95 1 78 178 8 77 0 33 67 158 6.5 203 0 80 172.5 8…arrow_forwardA Pew Internet survey in 2012 examined several demographic variables of users of social networking sites including sex, age, race, education and income. Of the 1,802 users surveyed, 846 were men and 525 of them used social networking sites. Among the 956 women in the survey, 679 of them used social networking sites. Is there good evidence that the proportion of Internet users who use social networking sites is different for men and women. Use the Plan, Solve and Conclude steps in answering this question.arrow_forward
- Rocky Mountain National Park is a popular park for outdoor recreation activities in Colorado. According to U.S. National Park Service statistics, 46.7% of visitors to Rocky Mountain National Park in 2018 entered through the Beaver Meadows park entrance, 24.3% of visitors entered through the Fall River park entrance, 6.3% of visitors entered through the Grand Lake park entrance, and 22.7% of visitors had no recorded point of entry to the park (U.S. National Park Service website). Consider a random sample of 175 Rocky Mountain National Park visitors. Use the normal approximation of the binomial distribution to answer the following questions. What is the probability that at least 75 visitors had a recorded entry through the Beaver Meadows park entrance? What is the probability that at least 70 but less than 80 visitors had a recorded entry through the Beaver Meadows park entrance? What is the probability that fewer than 10 visitors had a recorded entry through the Grand Lake park…arrow_forwardin a gallup poll of randomly selected adults, 66% said that they worry about identity theft. For a group of 1013 adults, the mean of those who do not worry identify theft is close to what?arrow_forward
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