C what percent of students take one or two courses 80

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c.What percent of students take one or two courses?80.Sixty adults with gum disease were asked the number of times per week they used to floss before their diagnosis. The(incomplete) results are shown inTable 1.34.# Flossing per WeekFrequencyRelative FrequencyCumulative Relative Freq.0270.450011830.9333630.0500710.0167Table 1.34 Flossing Frequency for Adults with Gum Diseasea.Fill in the blanks inTable 1.34.b.What percent of adults flossed six times per week?c.What percent flossed at most three times per week?6.Scott Keeter et al., “Gauging the Impact of Growing Nonresponse on Estimates from a National RDD TelephoneSurvey,” Public Opinion Quarterly 70 no. 5 (2006),()(accessed May 1, 2013).7.Frequently Asked Questions, Pew Research Center for the People & the Press, methodology/frequently-asked-questions/#dont-you-have-trouble-getting-people-to-answer-your-polls (accessed May 1,2013).56Chapter 1 | Sampling and DataThis OpenStax book is available for free at
81.Nineteen immigrants to the U.S were asked how many years, to the nearest year, they have lived in the U.S. The dataare as follows: 2; 5; 7; 2; 2; 10; 20; 15; 0; 7; 0; 20; 5; 12; 15; 12; 4; 5; 10.Table 1.35was produced.DataFrequencyRelative FrequencyCumulative Relative Frequency022190.1053233190.2632411190.3158533190.4737722190.57891022190.68421222190.78951511190.84212011191.0000Table 1.35 Frequency of Immigrant Survey Responsesa.Fix the errors inTable 1.35. Also, explain how someone might have arrived at the incorrect number(s).b.Explain what is wrong with this statement: “47 percent of the people surveyed have lived in the U.S. for 5 years.”c.Fix the statement inbto make it correct.d.What fraction of the people surveyed have lived in the U.S. five or seven years?e.What fraction of the people surveyed have lived in the U.S. at most 12 years?f.What fraction of the people surveyed have lived in the U.S. fewer than 12 years?g.What fraction of the people surveyed have lived in the U.S. from five to 20 years, inclusive?82.How much time does it take to travel to work?Table 1.36shows the mean commute time by state for workers at least16 years old who are not working at home. Find the mean travel time, and round off the answer properly.24.0 24.3 25.9 18.9 27.5 17.9 21.8 20.9 16.7 27.318.2 24.7 20.0 22.6 23.9 18.0 31.4 22.3 24.0 25.524.7 24.6 28.1 24.9 22.6 23.6 23.4 25.7 24.8 25.521.2 25.7 23.1 23.0 23.9 26.0 16.3 23.1 21.4 21.527.0 27.0 18.6 31.7 23.3 30.1 22.9 23.3 21.7 18.6Table 1.36Chapter 1 | Sampling and Data57
83.Forbesmagazine published data on the best small firms in 2012. These were firms which had been publicly traded forat least a year, have a stock price of at least $5 per share, and have reported annual revenue between $5 million and $1billion.Table 1.37shows the ages of the chief executive officers for the first 60 ranked firms.AgeFrequencyRelative FrequencyCumulative Relative Frequency40–44345–491150–541355–591660–641065–69670–741Table 1.37a.What is the frequency for CEO ages between 54 and 65?

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Term
Winter
Professor
Soumyakanti Chakarvarti
Tags
The Land, The Lottery, Quantitative continuous data

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