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essentials of statistics

Questions and Answers of Essentials Of Statistics

23. Construct a stem-and-leaf display for the following data.11.3 9.6 10.4 7.5 8.3 10.5 10.0 9.3 8.1 7.7 7.5 8.4 6.3 8.8
22. Construct a stem-and-leaf display for the following data.70 72 75 64 58 83 80 82 76 75 68 65 57 78 85 72
21. The Nielsen Home Technology Report provided information about home technology and its usage. The following data are the hours of personal computer usage during one week for a sample of 50
20. The top 20 concert tours and their average ticket price for shows in North America are shown here. The list is based on data provided to the trade publication Pollstar by concert promoters and
19. Sorting through unsolicited e-mail and spam affects the productivity of office workers. An InsightExpress survey monitored office workers to determine the unproductive time per day devoted to
18. NRF/BIG research provided results of a consumer holiday spending survey (USA Today, December 20, 2005). The following data provide the dollar amount of holiday spending for a sample of 25
17. What is the typical price for a share of stock for the 30 Dow Jones Industrial Average companies? The following data show the price for a share of stock to the nearest dollar in January 2006 (The
16. Consider the following two frequency distributions. The first frequency distribution provides an approximation of the annual adjusted gross income in the United States (Internal Revenue Service,
15. A doctor’s office staff studied the waiting times for patients who arrive at the office with a request for emergency service. The following data with waiting times in minutes were collected
14. Consider the following data.8.9 10.2 11.5 7.8 10.0 12.2 13.5 14.1 10.0 12.2 6.8 9.5 11.5 11.2 14.9 7.5 10.0 6.0 15.8 11.5a. Construct a dot plot.b. Construct a frequency distribution.c. Construct
13. Construct a histogram and an ogive for the data in exercise 12.
12. Consider the following frequency distribution.
11. Consider the following data.14 21 23 21 16 19 22 25 16 16 24 24 25 19 16 19 18 19 21 12 16 17 18 23 25 20 23 16 20 19 24 26 15 22 24 20 22 24 22 20a. Develop a frequency distribution using
10. Netflix, Inc., of San Jose, California, provides DVD rentals of more than 50,000 titles by mail.Customers go online to create an order list of DVDs they would like to view. Before ordering a
9. About 60% of small and medium-sized businesses are family-owned. A TEC International Inc. survey asked the chief executive officers (CEOs) of family-owned businesses how they became the CEO (The
8. Data for a sample of 55 members of the Baseball Hall of Fame in Cooperstown, New York, are shown here. Each observation indicates the primary position played by the Hall of Famers: pitcher (P),
7. Leverock’s Waterfront Steakhouse in Maderia Beach, Florida, uses a questionnaire to ask customers how they rate the server, food quality, cocktails, prices, and atmosphere at the restaurant.
6. The Nielsen Media Research television rating measures the percentage of television owners who are watching a particular television program. The highest-rated television program in television
5. In alphabetical order, the six most common last names in the United States are Brown, Davis, Johnson, Jones, Smith, and Williams (The World Almanac, 2006). Assume that a sample of 50 individuals
4. The top four primetime television shows were Law & Order, CSI, Without a Trace, and Desperate Housewives (Nielsen Media Research, January 1, 2007). Data indicating the preferred shows for a sample
3. A questionnaire provides 58 Yes, 42 No, and 20 no-opinion answers.a. In the construction of a pie chart, how many degrees would be in the section of the pie showing the Yes answers?b. How many
2. A partial relative frequency distribution is given.SELF test Class Relative Frequency A .22 B .18 C .40 Dnumerical values shown for each sector can be frequencies, relative frequencies, or percent
1. The response to a question has three alternatives: A, B, and C. A sample of 120 responses provides 60 A, 24 B, and 36 C. Show the frequency and relative frequency distributions.
25. Table 1.8 shows a data set containing information for 25 of the shadow stocks tracked by the American Association of Individual Investors (aaii.com, February 2002). Shadow stocks are common
24. A sample of midterm grades for five students showed the following results: 72, 65, 82, 90, 76. Which of the following statements are correct, and which should be challenged as being too
23. Nielsen Media Research conducts weekly surveys of television viewing throughout the United States, publishing both rating and market share data. The Nielsen rating is the percentage of households
22. In the fall of 2003, Arnold Schwarzenegger challenged Governor Gray Davis for the governorship of California. A Policy Institute of California survey of registered voters reported Arnold
21. A seven-year medical research study reported that women whose mothers took the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as were
20. A survey of 131 investment managers in Barron’s Big Money poll revealed the following(Barron’s, October 28, 2002):43% of managers classified themselves as bullish or very bullish on the stock
19. ABusinessWeek North American subscriber study collected data from a sample of 2861 subscribers. Fifty-nine percent of the respondents indicated an annual income of $75,000 or more, and 50%
18. A survey of 430 business travelers found 155 business travelers used a travel agent to make the travel arrangements (USA Today, November 20, 2003).a. Develop a descriptive statistic that can be
17. A manager of a large corporation recommends a $10,000 raise be given to keep a valued subordinate from moving to another company. What internal and external sources of data might be used to
16. The marketing group at your company developed a new diet soft drink that it claims will capture a large share of the young adult market.a. What data would you want to see before deciding to
15. The Food and Drug Administration (FDA) reported the number of new drugs approved over an eight-year period (The Wall Street Journal, January 12, 2004). Figure 1.9 provides a bar graph summarizing
14. CSM Worldwide forecasts global production for all automobile manufacturers. The following CSM data show the forecast of global auto production for General Motors, Ford, DaimlerChrysler, and
13. Figure 1.8 provides a bar graph summarizing the earnings for Volkswagen for the years 1997 to 2005 (BusinessWeek, December 26, 2005).a. Are the data qualitative or quantitative?b. Are the data
12. The Hawaii Visitors Bureau collects data on visitors to Hawaii. The following questions were among 16 asked in a questionnaire handed out to passengers during incoming airline flights in June
11. State whether each of the following variables is qualitative or quantitative and indicate its measurement scale.a. Annual salesb. Soft drink size (small, medium, large)c. Employee classification
10. The Wall Street Journal subscriber survey (October 13, 2003) asked 46 questions about subscriber characteristics and interests. State whether each of the following questions provided qualitative
9. The Commerce Department reported receiving the following applications for the Malcolm Baldrige National Quality Award: 23 from large manufacturing firms, 18 from large service firms, and 30 from
8. The Gallup organization conducted a telephone survey with a randomly selected national sample of 1005 adults, 18 years and older. The survey asked the respondents, “How would you describe your
7. The Ritz-Carlton Hotel used a customer opinion questionnaire to obtain performance data about its dining and entertainment services (The Ritz-Carrolton Hotel, Naples, Florida, February 2006).
6. Columbia House provides CDs to its mail-order club members. A Columbia House Music Survey asked new club members to complete an 11-question survey. Some of the questions asked were:a. How many CDs
5. Consider the data set for the sample of 10 minisystems in Table 1.7.a. How many variables are in the data set?b. Which of the variables are quantitative and which are qualitative?c. What is the
4. All-in-one sound systems, called minisystems, typically include an AM/FM tuner, a dualcassette tape deck, and a CD changer in a book-sized box with two separate speakers. The data in Table 1.7
3. Refer to Table 1.6.a. What is the average number of rooms for the nine hotels?b. Compute the average overall score.c. What is the percentage of hotels located in England?d. What is the percentage
2. Condé Nast Traveler magazine conducts an annual survey of subscribers in order to determine the best places to stay throughout the world. Table 1.6 shows a sample of nine European hotels(Condé
1. Discuss the differences between statistics as numerical facts and statistics as a discipline or field of study.
SOC/PS In Problem 12.13, you analyzed the relationships between voter turnout (Voters), education (College), and affluence (MdHHInc) for the States database.Now, analyze the combined effects of the
PS Use the Intl-Pop database to analyze the correlates of political and civil rights (Rights). Take affluence and income inequality as the independent variables and look at their combined effects on
SOC In Problem 12.11, you used the Intl-Pop database to analyze the bivariate relationships between cell phone usage, affluence (gross national income per capita), and urbanization. Now, you will
SOC In Problem 12.8, you used the States database to analyze the bivariate relationships between region(South/Non-South), education (percentage of the population with a college degree), and infant
SOC/CJ Use the States data set to analyze the rate of car theft (Carthft12). The independent variables will be population density (Popdense) and unemployment rate (Unemployment)● Click Analyze S
SOC/CJ Use the States data set to analyze the homicide rate (Hom12). The independent variables will be population density (Popdense) and unemployment rate (Unemployment)● Click Analyze S Regression
SOC Load the GSS2012 data set and analyze the relationships between number of hours spent on the Internet each week (the dependent or Y variable), and two independent variables: age and years of
SOC Load the GSS2012 data set and analyze the relationships between church attendance (the dependent or Y variable), and two independent variables: age and number of children. You analyzed some of
SW Twelve families have been referred to a counselor, and she has rated each of them on a scale that measures family cohesiveness. Also, she has information on family income and number of children
PS Problem 12.4 presented data on ten precincts.The information is reproduced here.Precinct Percentage democrat Percentage Minority Percentage voter Turnout a 33 9 36 B 78 15 60 C 62 18 64 d 50 10 56
SOC In problem 12.1, data regarding voter turnout in five cities was presented. For the sake of convenience, the data for three of the variables are presented again here along with descriptive
SOC/PS What are the correlates of voter turnout?Use the States database with Voters (percentage of the population voting for president in 2012) as the dependent variable and College (percent of the
SOC Follow up on problem 12.11 by finding the regression coefficients for the relationship between cell phone use and urbanization. Use the Intl-Pop dataset and the Regression command.● Load the
SOC Use the Intl-Pop dataset and the Correlate command to explore some of the correlates of cell phone use around the globe. Use CellPhones (the number of cell phone subscribers per 100 population),
SOC/CJ Follow up on problem 12.9 by finding the regression coefficients for the relationship between homicide rate and unemployment. Use the States data set and the Regression command.● Load the
SOC/CJ Use the States dataset and the Correlate command to explore some of the correlates of crime.Use two measures of crime in 2012 as dependent variables: the homicide rate (Hom12) and the rate of
SOC Load the States dataset and use the Correlate command to get correlations between SthDUMMY(South/Non-South), College (percentage of the state’s population with at least a college degree),
SOC Load the GSS2012 data set and use the Correlate command to get correlations between age (the independent or X variable) and four dependent (or Y) variables: church attendance (attend), number of
SOC Load the Intl-Pop data set and get scatterplots for the independent variable GNIcap (Gross National Income per capita, a measure of affluence) and each of these dependent variables: BirthRate
SOC The basketball coach at a small local college believes that his team plays better and scores more points in front of larger crowds. The number of points scored and attendance for all home games
PS The following variables were collected for a sample of ten precincts during the last national election. Compute r and r 2for each combination of variables and write a paragraph interpreting the
GER The residents of a housing development for senior citizens have completed a survey in which they indicated how physically active they are and how many visitors they receive each week. Are these
SOC Occupational prestige scores for a sample of fathers and their oldest son and oldest daughter are presented in the following table.Analyze the relationship between father’s and son’s prestige
is highly recommended. If you constructed one for computingb, you already have most of the quantities you will need to solve for r.)d. Describe the strength and direction of each relationship in a
is highly recommended.)b. State the least-squares regression line and predict the voter turnout for a city in which the unemployment rate was 12%, a city in which the average years of schooling was
PS Why does voter turnout vary from election to election? For municipal elections in five different cities, information has been gathered on the percentage of citizens who voted (the dependent
SOC and PS In this problem, you will use Spearman’s rho to analyze the relationship between two variables in the Intl-POP database. The first variable (rights) measures the extent of civil and
SOC In problem 10.16, you used Crosstabs to analyze the relationship between gender and fear of walking alone at night (fear), support for capital punishment (cappun), and job satisfaction (satjob).
SOC Twenty ethnic, racial, or national groups were rated by a random sample of white and black students on a Social Distance Scale. Lower scores represent less social distance and less prejudice.How
SOC Following are the scores of a sample of 15 nations on a measure of ethnic diversity (the higher the number, the greater the diversity) and a measure of economic inequality (the higher the score,
SOC Eleven neighborhoods have been rated by an urban sociologist on a “quality-of-life” scale(which includes measures of affluence, availability of medical care, and recreational facilities) and
SW A sample of children has been observed and rated for symptoms of depression. Their parents have been rated for level of alcohol use. Is there any relationship between these variables? Write a few
PA All applicants to the Police Academy are given an aptitude test, but the test has never been evaluated to see if test scores are in any way related to job performance. Describe the strength and
PA Various supervisors in the city government of Shinbone, Kansas, have been rated on the extent to which they practice authoritarian styles of leadership and decision making. The efficiency of each
SOC A small sample of non-English-speaking immigrants to the United States has been interviewed about their level of assimilation. Is the pattern of adjustment affected by length of residence in the
PS Below are some of the tables you analyzed in problem 10.17. You already have the results of the chi square tests. Now, analyze these relationships in terms of association, using an appropriate
SOC Below are the four dependent variables crosstabulated against gender. Analyze these relationships with column percentages, the maximum difference, and an appropriate measure of association.
GER A survey of senior citizens who live in either a housing development specifically designed for retirees or an age-integrated neighborhood has been conducted. Is type of living arrangement related
SOC A researcher has conducted a survey on sexual attitudes for a sample of 317 teenagers. The respondents were asked whether they considered premarital sex “always wrong” or “Not always
SOC The administration of a local college campus wants to increase the mandatory student fee to finance an upgrading of the football program. A survey of a sample of faculty regarding this proposal
SOC Is there a relationship between education(degree) and support for the theory of evolution(evolved) and the “big bang” theory of the creation of the universe (bigbang)? Would you predict that
SOC Is there a relationship between gender and fear of walking alone at night (fear), support for capital punishment (cappun), and job satisfaction(satjob)? Are men or women more likely to say that
PS A random sample of 748 voters in a large city was asked how they voted in the presidential election of 2012. Calculate chi square and the column percentages for each table below and write a brief
SOC A researcher is concerned with the relationship between attitudes toward violence and violent behavior. Do attitudes “cause” behavior? Do people who have positive attitudes toward violence
SOC Does support for the legalization of marijuana vary by region of the country? The table displays the relationship between the two variables for a random sample of 1020 adult citizens. Is the
SOC An urban planning commissioner has created a database describing a sample of the neighborhoods in her city and has developed a scale by which each area can be rated for the “quality of life”
SOC At a large urban college, about half of the students live off campus in various arrangements, and the other half live on campus. Is academic performance dependent on living arrangements? Write a
PS Is there a relationship between college class standing and political orientation? Are juniors and seniors significantly different from freshmen and sophomores on this variable? The following table
SOC Is there a statistically significant relationship between length of marriage and satisfaction with marriage? The necessary information has been collected from a random sample of 100 respondents
SOC A program of pet therapy has been running at a local nursing home. Are the participants in the program significantly more alert and responsive than nonparticipants? (Remember to compute column
SOC The state Department of Education has rated a sample of local school systems for compliance with state-mandated guidelines for quality.a. Is there a statistically significant relationship between
CJ A local judge has been allowing some individuals convicted of “driving under the influence” to work in a hospital emergency room as an alternative to fines, suspensions, and other penalties. A

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