Introduction To Business Statistics 6th Edition Ronald M. Weiers - Solutions

The American Association of Retired Persons (AARP) has compiled data on death rates (deaths per 1000 people) from heart disease and cancer for the 50 states. The states and their respective death rates from these two diseases are provided in data file XR03046. Generate a scatter diagram with axes
For a set of data, r2 is 0.64 and the variables x and y are inversely related. What is the numerical value of r?
What is the coefficient of determination and what does it tell us about the relationship between two variables?
A Polk Company survey found that households with someone who frequently plays golf have a median income of $54,826, compared to a median of $37,354 for all households. Under the assumption that the golfing households surveyed by the company could have been represented by the 100 incomes in file
Provide a real or hypothetical example of a situation where the range could be misleading as a measure of dispersion.
A student scored 90 on the midterm exam, 78 on the final exam, and 83 on the term project. If these three components are weighted at 35%, 45%, and 20%, respectively, what is the weighted mean for her course performance?
The following is a list of closing prices for 15 stocks widely held by Merrill Lynch account holders. What was the average closing price for this sample of stocks? The median closing price? Price Company Company Price ExxonMobil GE Intel $31.69 56.69 $83.50 56.88 72.06 AT&T America Online Cisco
For 1979 through 1998, the net rate of investment income for U.S. life insurance companies was as follows. What was the mean net rate of investment income for this period? The median? Year Percentage Year Percentage 1989 1979 7.73 9.10 1990 8.89 1980 8.02 1981 8.57 1991 8.63 8.91 1982 1992 8.08
social scientist would like to use a pictogram in comparing the number of violent crimes against persons in 2006 with the comparable figure for 1960. Considering that she can select from a wide variety of symbols to demonstrate these frequencies, suggest several possible symbols that would tend to
For the period 1990€“1999, the Bristol-Myers Squibb Company, Inc. reported the following amounts (in billions of dollars) for (1) Net sales and (2) Advertising and product promotion. The data are also in the file XR02062.For these data, construct a line graph that shows both net
The following stem-and-leaf output has been generated by Minitab. The data consist of three-digit integers.a. From this display, is it possible to determine the exact values in the original data? If so, list the data values. If not, provide a set of data that could have led to this display.b.
During 2001, sales of new, privately owned homes in the total United States and in the western states were broken down into price categories as follows:Convert these data to relative frequency distributions, one for the total United States, the other for the western states. Do the results appear to
In 2004, unemployment rates in the 50 U.S. states were reported as follows. These data are also provided in the file XR02058.a. Construct a stem-and-leaf display for these data.b. Construct a frequency distribution for these data.c. Determine the interval width and the class mark for each of the
The average daily cost to community hospitals for patient stays during 1993 for each of the 50 U.S. states was as follows:These data are also provided in the file XR02057. SOURCE: Health Insurance Association of America, Source Book of Health Insurance Data 1995, p. 103.a. Construct a stem-and-leaf
The breakdown of U.S. cities having a population of at least 10,000 persons has been reported as follows.a. How many cities have a population of at least 25,000 but less than 500,000?b. How many cities have a population less than 250,000?c. How many cities have a population of at least 100,000 but
The following data represent x = the total number of businesses and y = the number of business failures in mountain states over a 1-year period.a. Draw a scatter diagram representing these data.b. Using the €œeyeball€ method, fit a straight line to the data.c. Does there appear
PC World reports the following text and graphics speeds (pages per minute, or ppm) for its top-rated inkjet printers.a. Draw a scatter diagram representing these data. b. Using the €œeyeball€ method, fit a straight line to the data.c. Does there appear to be any
When there is no relationship between two variables, what will tend to be the slope of the best-fit straight line through the scatter diagram?
Differentiate between a positive linear relationship and a negative linear relationship between variables.
Federal outlays for national defense totaled $348 billion in 2002 compared with just $134 billion in 1980.a. Using appropriate symbols that would reflect favorably on such an increase, construct a pictogram to compare 2002 with 1980.b. Using appropriate symbols that would reflect unfavorably on
It has been estimated that 95.5% of U.S. households own a telephone and that 68.5% have cable television.a. Why can’t this information be summarized in one pie chart?b. Construct two separate pie charts to summarize telephone ownership and cable television service.
For the period 1995€“2005, McDonald€™s Corporation paid the following dividends (rounded to nearest penny) per share of common stock.Using these data and the data in Exercise 2.32, draw a line graph that describes both net income and dividend per share of common stock over
For McDonald€™s Corporation, net income per share of common stock was as follows for the period 1995€“2005.Construct a line graph describing these data over time. 1995 $0.97 $1.25 2001 1.08 2002 1996 0.70 1.15 2003 1997 1.15 1.10 1998 2004 1.79 2005 1999 1.39 2.04 2000 1.46
The following U.S. market shares for automobile and light-truck sales for 2001 and 2002 have been reported.a. Express the data for the 2001 model year in the formof a bar chart.b. Express the data for the 2002 model year in the form of a bar chart. Country or Region of Manufacture 2001 2002
Construct a stem-and-leaf display for the following data: 22 28 28 29 32 46 46 46 52 52 53 53 54 56 57 57 59 60 61 61 63 41 11 24 33 41 13 24 33 37 39 17 24 19 26 19 42 24 30 30 57 59 43 43 48 49
Construct a stem-and-leaf display for the following data: 34 25 46 75 15 81 69 72 15 19 64 67 62 24 57 27 48 35 41 64 51 48 42 77 71 38 20 26 83 21
One of the ways Keynote Systems, Inc., measures Internet shopping site performance is by visiting a site and measuring how long it takes to come up on the user’s PC. In one such study, they found the average time for an Internet shopping site to come up was 21.80 seconds. Assume that website
For commercial banks in each state, the U.S. Federal Deposit Insurance Corporation has listed their total deposits (billions of dollars) as follows.Construct a frequency distribution and a histogram for these data. Deposits Deposits Deposits 200.2 AL 62.6 LA 55.2 Он 6.0 16.7 AK ME OK 46.3 61.8 MD
What is meant by the statement that the set of classes in a frequency distribution must be mutually exclusive and exhaustive?
The National Center for Health Statistics reports the following age breakdown of deaths in the United States during 2002.Age (Years) Number of Deaths (Thousands)under
The National Safety Council reports the following age breakdown for licensed drivers in the United States.Age (Years) Licensed Drivers
Generally, how do we go about deciding how many classes to use in a frequency distribution?
For each of the following, indicate the scale of measurement that best describes the information. a. In January 2003, Dell Corporation had approximately 39,100 employees.b. USA Today reports that the previous day’s highest temperaturein the United States was 115 degrees in Death Valley,
A research firm observes that men are twice as likely as women to watch the Super Bowl on television. Does this information represent descriptive statistics or inferential statistics? Why?
The headline of an article in your daily newspaper begins “Research Study Reveals. . . .” As a statistics student who wishes to avoid accepting biased results, what single question should be foremost in your mind as you begin reading the article?
What kinds of statistical data might a burglar alarm company employ in trying to convince urban homeowners to purchase its product?
Restaurants sometimes provide “customer reaction” cards so that customers can evaluate their dining experience at the establishment. What kinds of decisions might be made on the basis of this information?
What is the difference between a qualitative variable and a quantitative variable? When would each be appropriate?
An article in Runner’s World magazine described a study that compared the cardiovascular responses of 20 adult subjects for exercises on a treadmill, on a mini trampoline, and jogging in place on a carpeted surface. Researchers found average heart rates were significantly less on the mini
In 2002, the Cinergy Corporation sold 35,615 million cubic feet of gas to residential customers, an increase of 1.1% over the previous year. Does this information represent descriptive statistics or inferential statistics? Why?
In what ways can business statistics be useful in today’s business environment?
What was the primary use of statistics in ancient times?

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