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Questions and Answers of Business Statistics

This study captures the daily activities of Canadians to show marketers what opportunities they have to present their messages. It finds that, in an average day, adult Canadians divide their time as
The name Encana combines the words ENergy, CANada, and Alberta. The numbers of oil and gas wells Encana drilled in five major fields during 2012 and 2013 are as follows:a) Draw bar graphs to compare
Accidents in Canada involving dangerous goods must be reported to the government and are recorded by Statistics Canada. Set out below is a summary of the number of such accidents in four selected
The table below shows the number of injuries in Canada from some forms of transport accidents by gender, in 2011:a) If possible, calculate the percentage of male injuries from transport accidents
Which countries are associated with the highest gambling rates? The table below shows gambling losses per person in selected nations in 2013 according to The Economist. Make a graphical comparison
The table below gives the 2015 unemployment rate according to stats.oecd.org for selected countries. Create a graphical representation of these data that facilitates comparison among the countries,
The government net financial liabilities as a percentage of GDP is given in the table below for selected countries in 2015 according to stats.oecd.org. Present these data in a graph that allows you
The number of nuclear reactors that were operational in selected countries in 2014 is given in the table below, together with the number of additional nuclear reactors under construction or planned
Most people have heard of the unemployment rate, but not so many know where it comes from. Does the rate simply represent the number of people claiming Employment Insurance (EI)? It turns out that
You are part of a marketing team that needs to research the potential of a new smartphone. Your team decides to email an interactive survey to a random sample of consumers. Write a short
Harris Interactive conducts surveys online with panels of people who have volunteered to participate. One of these is the “Body Mass Index” panel consisting of people classified into four groups
The Canadian Census collects demographic data for specific groups such as lone-parent families, seniors, and those from specific language groups via what is commonly referred to as the “Short
An opinion poll needs to assess the popularity of the Royal Family and is choosing among three questions:Question 1: Do you think the Canadian Head of State should be a member of the Royal Family or
Here are more proposed questions for the survey in exercise 13.Question 3: Many people in Japan have optical fibre connected to their homes. Should it be made available to you?Question 4: Since HDTV
Some people have been complaining that the children’s playground at a municipal park is too small and is in need of repair. Managers of the park decide to survey city residents to see if they
Fisheries and Oceans Canada operates a laboratory in Sault Ste. Marie, Ontario, to study the abundance of species of fish that have invaded the Great Lakes from other ecosystems. Researchers have
A cable TV company is considering offering optical fibre to residences to improve the speed of its HDTV download service. Before launching the new service, however, the company wants to find out
Consumers Union asked all subscribers whether they had used alternative medical treatments and, if so, whether they had benefited from them. For almost all the treatments, approximately 20% of those
To estimate the impact of new technologies on fuel efficiency for motor vehicles, a consulting company requests the opinions of established researchers in the automobile industry, the clean-tech
At its website (www.gallup.com), the Gallup Poll publishes results of a new survey each day. Scroll down to the end, and you’ll find a statement that includes an explanation such as this:Results
The Ontario Ministry of Natural Resources plans to study the fishing industry around Port Dover on Lake Erie. To do that, researchers decide to randomly select five fishing boats at the end of a
Here are more proposed survey questions for the survey mentioned in Exercise 13:Question 3: Do you find that the slow speed of dial-up internet access reduces your enjoyment of web services?Question
An intern for the consumer advocacy group in Exercise 3 has decided to make the survey process simpler by calling 150 of the members who attended the symposium on “Food Safety in the 21st
The airline company from Exercise 4, which is interested in the opinions of its frequent f lyer customers about its proposed new routes, has decided that different types of customers might have
The consumer advocacy group from Exercise 3 that was interested in gauging perceptions about food safety among professionals in the food industry has decided to use a different method to generate a
GfK Roper Consulting conducts a global consumer survey to help multinational companies understand different consumer attitudes throughout the world. In India, the researchers interviewed 1000 people
A consumer advocacy group is interested in gauging perceptions about food safety among professionals in the food industry. Specifically, the analysts in the advocacy group wish to determine the
A Canadian immigrant, Anjali Gupta, and her Canadian-born friend, Bob Fisher, are celebrating at their high school graduation ceremony. They’ve both worked hard, achieved great grades, and been
Like all credit and charge card companies, this company makes money on each of its cardholders’ transactions. Thus, its profitability is directly linked to card usage. To increase customer spending
Canadians have been playing hockey since the 19th century. The National Hockey League (NHL) was founded in Montreal in 1917, with the Ottawa Senators as one of its founding members. Every fall, as
For the data given in Mini Case Study: “Canadian Immigrants,”a) Identify the Five W’s and also How.b) Identify which data (if any) arei) Quantitative/categoricalii) Cross-sectional/time
Attendance at the third World Series game, recording the age of each fan.Indicate whether the data are a time series or a cross-section.
Number of cars sold by each salesperson in a dealership in September.Indicate whether the data are a time series or a cross-section.
Data collected on investments in Broadway shows: number of investors, total invested (in $), name of the show, profit/loss (in $) after one year.Show how you would lay out the data. Indicate the
Data collected for financial planning: weekly sales (in $), week (week number of the year), sales predicted by last year’s plan (in $), difference between predicted sales and realized sales (in
Data collected to determine performance-based bonuses: employee ID, amount of average contract closed (in $), supervisor’s rating (1–10), years with the company.Show how you would lay out the
For a study of mortgage loan performance: amount of the loan (in $), the name of the borrower.Show how you would lay out the data. Indicate the headings of columns and what would be found in each row.
A study on the potential for developing theme parks in various locations throughout Europe in 2017 collects the following information: the country where the proposed site is located, the estimated
An online survey of students in a large MBA Statistics class in Toronto asked them to report their total personal investment in the stock market ($), the total number of different stocks currently
In order to provide information for the tourism industry, Statistics Canada collects data on overnight visitors to Canada according to the visitor’s country of origin. Data is collected every year
Statistics Canada collects data on the value (in $) and volume (in m3) of crude oil, natural gas, and natural gas byproducts produced in Canada each year.Identify the Five W’s, name the variables,
In order to investigate social trends, Statistics Canada collects data on family type (e.g., married-couple families, common-law-couple families, single-parent families) in the census every five
In order to project the future of the mobile phone business, market analysts collect data on sales of mobile phones by major manufacturer in each country for each quarter of each year.Identify the
The Canadian Transportation Agency (CTA) monitors airlines for adherence to safety regulations and customer service. For each f light, the carrier must report the type of aircraft, number of
The Gallup Poll conducted a representative telephone survey of 1180 Canadian voters. Among the reported results were the voter’s region (East, West, Prairie, etc.), age, political party
As research for an ecology class, university students in Alberta collect data on streams each year to study the impact of pollution on the environment. They record a number of biological, chemical,
A survey of autos parked in executive and staff lots at a large company recorded the make, country of origin, type of vehicle (car, van, SUV, etc.), and age.Identify the Five W’s, name the
A Canadian startup company is building a database of customers and sales information. For each customer, it records name, ID number, region of the country (1 = West, 2 = Prairies, 3 = North, 4 =
An internationally recognized MBA program in London intends to track the GPA of its MBA students and compares MBA performance with standardized test scores over the past five years.Identify the Five
A listing posted by the Subway restaurant chain gives, for each of the sandwiches it sells, the type of meat in the sandwich, number of calories, and serving size in grams. The data might be used to
The company in Exercise 11 is also interested in the impact of national indicators on its sales. It decides to obtain measurements for the unemployment rate (%) and inf lation rate (%) on a quarterly
A food retailer that specializes in selling organic food has decided to open a new store. To help determine the best location for the new store, researchers decide to examine data from existing
A major Canadian company is interested in seeing how various promotional activities are related to domestic sales. Analysts decide to measure the money spent on different forms of advertising ($
After several major ocean oil spills, oil tankers have been designed with thicker hulls and other structural improvements. The intention is to reduce the chance of an oil spill in the future, and if
A major factor influencing the rate of growth of a country’s economy is the availability of credit for investment purposes. Domestic credit is the amount of credit given out by the Bank of Canada
In addition to “employed” and “unemployed,” some economists identify a third category, “non-employed,” consisting of people who may not be looking for a job but are available to work, if
Referring to Understanding Your Data: “Canadian Unemployment Rate,” classify the following people as “employed,” “unemployed,” or “not in the labour force”:a) Someone on vacation from
Referring to the bookstore data table of Exercise 2,a) For each variable, would you describe it as primarily categorical or quantitative? If quantitative, what are the units? If categorical, is it
Refer to the Lincolnwood School District bus data.a. Suppose we consider a bus “old” if it has been in service more than 8 years. At the .01 significance level, can we conclude that less than 40%
A coin toss is used to decide which team gets the ball first in most sports. It involves little effort and is believed to give each side the same chance. In 51 Super Bowl games, the coin toss
Refer to the Lincolnville School District bus data. First, add a variable to change the type of engine (diesel or gasoline) to a qualitative variable. If the engine type is diesel, then set the
Refer to the Baseball 2016 data, which report information on the 30 Major League Baseball teams for the 2016 season. Let the number of games won be the dependent variable and the following variables
Refer to the Lincolnville School bus data. Develop a regression equation that expresses the relationship between age of the bus and maintenance cost. The age of the bus is the independent variable.a.
Refer to the Baseball 2016 data, which report information on the 2016 Major League Baseball season. Let attendance be the dependent variable and total team salary be the independent variable.
For a sample of 40 large U.S. cities, the correlation between the mean number of square feet per office worker and the mean monthly rental rate in the central business district is −0.363. At the
Refer to the Baseball 2016 data, which report information on the 30 Major League Baseball teams for the 2016 season.a. At the .10 significance level, is there a difference in the variation in team
Refer to the Lincolnville School District bus data.a. Conduct a test of hypothesis to reveal whether the mean maintenance cost is equal for each of the bus manufacturers. Use the .01 significance
The postal service sorts mail as Priority Mail Express, Priority Mail, First-Class Mail, or Standard Mail. Over a period of 3 weeks, 18 of each type were mailed from the Network Distribution Center
One variable that Google uses to rank pages on the Internet is page speed, the time it takes for a web page to load into your browser. A source for women’s clothing is redesigning their page to
A stock analyst wants to determine whether there is a difference in the mean return on equity for three types of stock: utility, retail, and banking stocks. The following output is obtained:a. Using
Refer to the Lincolnville School District bus data. Is there a difference in the mean maintenance cost for the diesel versus the gasoline buses? Use the .05 significance level.
Refer to the Baseball 2016 data, which report information on the 30 Major League Baseball teams for the 2016 season.a. At the .05 significance level, can we conclude that there is a difference in the
The North Valley Real Estate data report information on the homes sold last year.a. At the .05 significance level, can we conclude that there is a difference in the mean selling price of homes with a
The following data on annual rates of return were collected from 11 randomly selected stocks listed on the New York Stock Exchange (“the big board”) and 12 randomly selected stocks listed on
A candy company taste-tested two chocolate bars, one with almonds and one without almonds. A panel of testers rated the bars on a scale of 0 to 5, with 5 indicating the highest taste rating. Assume
A computer manufacturer offers technical support that is available 24 hours a day, 7 days a week. Timely resolution of these calls is important to the company’s image. For 35 calls that were
Refer to the Lincolnville School District bus data.a. Select the variable for the number of miles traveled last month. Conduct a hypothesis test to determine whether the mean miles traveled last
The publisher of Celebrity Living claims that the mean sales for personality magazines that feature people such as Megan Fox or Jennifer Lawrence are 1.5 million copies per week. A sample of 10
For a recent year, the mean fare to fly from Charlotte, North Carolina, to Chicago, Illinois, on a discount ticket was $267. A random sample of 13 round-trip discount fares on this route last month
A Washington, D.C., €œthink tank€ announces the typical teenager sent 67 text messages per day in 2017. To update that estimate, you phone a sample of 12 teenagers and ask them
Refer to the Lincolnville School District bus data.a. Develop a 95% confidence interval for the mean bus maintenance cost.b. Develop a 95% confidence interval for the mean bus odometer miles.
HighTech Inc. randomly tests its employees about company policies. Last year, in the 400 random tests conducted, 14 employees failed the test. Develop a 99% confidence interval for the proportion of
Pharmaceutical companies promote their prescription drugs using television advertising. In a survey of 80 randomly sampled television viewers, 10 indicated that they asked their physician about using
Dr. Susan Benner is an industrial psychologist. She is currently studying stress among executives of Internet companies. She has developed a questionnaire that she believes measures stress. A score
PrintTech Inc. is introducing a new line of inkjet printers and would like to promote the number of pages a user can expect from a print cartridge. A sample of 10 cartridges revealed the following
In 2003, the Accreditation Council for Graduate Medical Education (ACGME) implemented new rules limiting work hours for all residents. A key component of these rules is that residents should work no
An important factor in selling a residential property is the number of times real estate agents show a home. A sample of 15 homes recently sold in the Buffalo, New York, area revealed the mean number
A study of 25 graduates of four-year public colleges revealed the mean amount owed by a student in student loans was $55,051. The standard deviation of the sample was $7,568. Construct a 90%
A student conducted a study and reported that the 95% confidence interval for the mean ranged from 46 to 54. He was sure that the mean of the sample was 50, that the standard deviation of the sample
The human relations department of Electronics Inc. would like to include a dental plan as part of the benefits package. The question is: How much does a typical employee and his or her family spend
The American Restaurant Association collected information on the number of meals eaten outside the home per week by young married couples. A survey of 60 couples showed the sample mean number of
A recent survey of 50 executives who were laid off during a recent recession revealed it took a mean of 26 weeks for them to find another position. The standard deviation of the sample was 6.2 weeks.
As part of their business promotional package, the Milwaukee Chamber of Commerce would like an estimate of the mean cost per month to lease a one-bedroom apartment. The mean cost per month for a
The estimate of the population proportion should be within plus or minus .10, with a 99% level of confidence. The best estimate of the population proportion is .45. How large a sample is required?
The Buffalo, New York, Chamber of Commerce wants to estimate the mean time workers who are employed in the downtown area spend getting to work. A sample of 15 workers reveals the following number of
The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 16 people reveals the mean yearly consumption to be 45 gallons with a standard deviation of 20 gallons. Assume
Suppose you know σ and you want an 85% confidence level. What value would you use as z in formula (9–1)?
Refer to the Baseball 2016 data, which report information on the 30 Major League Baseball teams for the 2016 season. Over the last decade, the mean attendance per team followed a normal distribution
Refer to the North Valley Real Estate data, which report information on the homes sold last year. Assume the 105 homes is a population. Compute the population mean and the standard deviation of
An economist uses the price of a gallon of milk as a measure of inflation. She finds that the average price is $3.82 per gallon and the population standard deviation is $0.33. You decide to sample 40

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