Questions and Answers of Basic Statistics In Business And Economics 10th

More than 16,000 older women were asked to wear a device to record their steps per day over the course of a week, and the women were then divided into quartiles based on the number of steps per day.
A study conducted in July 2015 examines smartphone ownership by US adults. A random sample of 2001 people were surveyed, and the study shows that 688 of the 989 men own a smartphone and 671 of the
Use StatKey or other technology to generate a sampling distribution of sample means using a sample size of n = 10 from the population of all times to finish the 2016 Olympic Men’s Marathon,
Do the data provide evidence that eating ultra-processed foods, as opposed to unprocessed food, causes people to consume more calories? The differences in weight gain, ultra-processed −
A randomized controlled experiment involving over 10,000 students enrolled in 4th to 8th grade in Texas examined the impact of arts education on a wide variety of outcomes. Arts education included
A study by the Pew Research Center reports that in 2010, for the first time, more adults aged 18 to 29 got their news from the Internet than from television. In a random sample of 1500 adults of all
The Ignorance Surveys were conducted in 2013 using random sampling methods in four different countries under the leadership of Hans Rosling, a Swedish statistician and international health advocate.
Sepsis occurs when a person’s body has an overwhelmingly dangerous response to an infection. It can affect people of all ages and is life-threatening. Because vitamin C is believed to reduce
Find the given area in a standard normal distribution.The area in the right tail more extreme than z = 2.20
Find the given area in a standard normal distribution.The area in the right tail more extreme than z = 0.80
Find the given area in a standard normal distribution.The area in the right tail more extreme than z = −1.25
In 2019, some researchers with the Pew Research Center interviewed a random sample of US adults about their social media usage. One of the questions was whether the person used the Facebook social
Find the given area in a standard normal distribution.The area in the right tail more extreme than z = 3.0
Find the given area in a standard normal distribution.The area in the left tail more extreme than z = −1.75
Find the given area in a standard normal distribution.The area in the left tail more extreme than z = −2.60
Technology can be a wonderful resource in education, but when technology such as laptops or phones are used by students during class for reasons not related to class (called off-task use), its use
Give the correct notation for the quantity described and give its value.Correlation between points and penalty minutes for all 26 regular players (at least 20 games played) on the 2018–2019 Ottawa
People 65 years and older are the fastest growing segment of the US population, and constituted 13% of the population in 2010. Figure 3.10 shows sample proportions from two sampling distributions of
NFL Contracts 2019 contains the yearly salary (in millions of dollars) from the contracts of all players on a National Football League (NFL) roster at the start of the 2019 season.(a) Use StatKey or
Give the correct notation for the quantity described and give its value.Average enrollment in charter schools in Illinois. In 2014, there were 148 charter schools in the state of Illinois and the
State whether the quantity described is a parameter or a statistic and give the correct notation.Correlation between height and weight for players on the 2020 Brazil World Cup Team, using data from
Give the correct notation for the quantity described and give its value.Proportion of US adults who own a cell phone. In a survey of 1502 US adults in 2019, 98% said they had a cell phone.
Triclosan is a compound often added to products such as soaps, lotions, and toothpaste. It is antimicrobial, so we expect it to lower one’s chance of having a staph infection. However, the opposite
A random sample of n = 461 smartphone users in the US in January 2015 found that 355 of them have downloaded an app.(a) Give notation for the parameter of interest, and define the parameter in this
Canada conducts a census every five years. The 2016 Canadian Census shows that 81.7% of Canadian adults have a secondary or equivalent degree.(a) Give the correct notation for this value and write
Different species can interact in interesting ways. One type of grass produces the toxin ergovaline at levels about 1.0 part per million in order to keep grazing animals away However, a recent
From its founding through 2019, the Rock and Roll Hall of Fame has inducted 329 groups or individuals. Fifty-two of the inductees have been female or have included female members. The full dataset is
Data from a sample is being used to estimate something about a population. In each case:A random sample of registered voters in the US is used to estimate the proportion of all US registered voters
Data from a sample is being used to estimate something about a population. In each case:A random sample of maple trees in a forest is used to estimate the mean base circumference of all maple trees
The Higher Education Research Institute conducts Your First College Year survey every year. The 2018 survey included 5204 first-year, full-time college students. Their responses to a question about
Suppose an experiment will randomly divide 40 cases between two possible treatments, A and B, and will then record two possible outcomes, Successful or Not successful. The outline of a two-way table
A two-way table is shown for two groups, 1 and 2, and two possible outcomes, A and B. In each case,(a) What proportion of all cases had Outcome A? (b) What proportion of all cases are in Group 1?(c)
A study examined whether frequent use of digital social media during adolescence is associated with subsequent occurrence of ADHD symptoms. Researchers rated the frequency of digital social media use
Researchers studying animal behavior have found that rats can quickly learn to play hide-and-seek with humans. The rats seem to love the game, squeaking and jumping for joy when they find the human
To predict the outcome of an election, 2500 likely voters are randomly selected to take a survey.(a) Does the study appear to use random sampling? (Yes or No) (b) Does the study appear to use
Figure A.12 shows a dotplot of the arsenic concentrations in Table A.11.(a) Which measures of center and spread are most appropriate for this distribution: the mean and standard deviation or the five
A Canadian longitudinal study examines whether giving antibiotics in infancy increases the likelihood that the child will be overweight later in life. The children were classified as having received
The students in an Introductory Statistics class are asked to complete a survey about study habits.(a) Does the study appear to use random sampling? (Yes or No). (b) Does the study appear to use
A 2019 survey examined cell phone ownership by US adults. The results of the survey are shown in Table A.6.(a) Make a relative frequency table of the data. Give results to three decimal places. (b)
Stanley, a recent high school student, took the SAT exam in 2018 and got a 600 in both components (Reading and Writing, and Math). He was interested in how well he did compared to the rest of his
In the oncology unit of a hospital, half the breast cancer patients are randomly selected to receive a new drug while the rest will receive a placebo. (a) Does the study appear to use random
At a large university, 100 students are randomly selected to take part in a marketing study. Half of these students will be randomly assigned to view one advertising campaign while the other half
Students in a Psychology class are shown a scary movie while eating popcorn, to examine the impact of fear on appetite.(a) Does the study appear to use random sampling? (Yes or No).(b) Does the study
A histogram of total US monthly retail sales, in billions of dollars, for the 129 months starting with January 2009 is shown in Figure 2.30. Is the distribution approximately symmetric and
In a study examining the reaction of mice to alcohol, all 50 mice in a lab will be randomly assigned to either have alcohol mixed in with their water or to have non-alcoholic liquid of similar taste
The random assignment at the start of the experiment put 1017 smokers in the Reward group and 914 of them agreed to participate. However, only 146 of the 1053 smokers assigned to the Deposit group
Give the relevant proportion using correct notation. A recent headline states that “45% Think Children of Illegal Immigrants Should Be Able to Attend Public School.” The report gives the results
Give the relevant proportion using correct notation. A survey conducted of 1060 randomly selected US teens aged 13 to 17 found that 605 of them say they have made a new friend online.
Table 2.24 shows the number of women (per 1000) between 15 and 50 years of age who have been married grouped by the number of children they have had. Table 2.25 gives the same information for women
Does cuddling after sex help boost sexual and relationship satisfaction? A study involving 335 participants involved in romantic relationships found that people who reported more time spent on
Side-by-side boxplots are used to view a relationship between a categorical variable and a quantitative variable. Draw any side-by-side boxplots that show: (a) A clear association between the
A survey conducted in March 2015 asked 1060 teens to estimate, on average, the number of friends they had made online. While 43% had not made any friends online, a small number of the teens had made
Suppose we record the husband’s age and the wife’s age for many randomly selected male female married couples. Since these are both quantitative variables, we create a scatterplot for the data,
Many communities add fluoride to their drinking water to prevent tooth decay. However, fluoride crosses the placenta and laboratory studies show that it accumulates in brain regions involved in
The PA Seniors dataset has survey data from a sample of Pennsylvania high school seniors who participated in the Census at Schools project over the decade from 2010 to 2019. One of the variables (TV
There are five variables in the dataset, and all are included in the scatterplot matrix shown in Figure 2.102. The graph shows scatterplots for each pair of quantitative variables, with the Type
A recent study has found an association between elevation and lung cancer incidence. Incidence of cancer appears to be lower at higher elevations, possibly because of lower oxygen levels in the air.
The Professional Winner was RJ Andrews from Info We Trust, for the video “Are Gazelles Endangered?”(a) Watch this video. What data are this video conveying? (b) You can interact with the
Find your own data visualization online.(a) Include a screenshot of the visualization. (b) What data are being displayed? (c) Describe the story told by the visualization.
Seven of the ten largest cities in the world are in the Eastern Hemisphere (including the largest: Tokyo, Japan) and three are in the Western Hemisphere. Table 1.3 shows the populations, in millions
The American Academy of Pediatrics recommends that parents begin reading to their children soon after birth, and that parents set limits on screen time. A new study The American Academy of Pediatrics
The data in PASeniors shows results for a sample of 457 high school seniors in the state of Pennsylvania, selected at random from all students who participated in the Census at Schools project
For the 2015 Intel Science Fair, two brothers in high school recruited 47 of their classmates to take part in a two-stage study. Participants had to read two different passages and then answer
Next time you see an elderly man, check out his nose and ears! While most parts of the human body stop growing as we reach adulthood, studies show that noses and ears continue to grow larger
In a random sample of 3500 Canadian consumers, about 71% report that they regularly stream music.(a) Is the sample likely to be representative of all Canadian consumers? Why or why not? (b) Is
In June 2018, a poll asked a random sample of 1000 US adults whether global warming will be a serious problem for the United States. The results show that 51% think global warming will be a very
A 2019 study conducted by eMarketer asked 800 US smartphone users whether they had used a food delivery app at least once in the last month. The survey also asked which food delivery app, if any, was
Mentally simulate ten tosses of a coin by writing down a sequence of Heads and Tails that might result from ten flips of a fair coin. (Try this now!) When a random sample of people were asked to do
As part of an “internet cat videos/photos” study, Dr. Jessica Gall Myrick posted an on-line survey to Facebook and Twitter asking a series of questions regarding how individuals felt before and
There were 1295 movies made in Hollywood between 2012 and 2018. Suppose that, for a documentary about Hollywood film crews, a random sample of 5 of these movies will be selected for in-depth
Science deniers oppose robust and valid results of scientific inquiry. A recent study investigates the most effective ways to debunk scientific misinformation. Science advocates can respond to
A study involving middle-school students investigates the link between a diet high in processed foods and rates of depression. Researchers collected the urine of the participants and measured levels
A 2014 headline reads “Sitting Is the New Smoking: Ways a Sedentary Lifestyle is Killing You, and explains the mounting evidence for ways in which sitting is bad for you. A more recent large 2015
Following are the 29 players on the opening-day roster of the 2019 Boston Red Sox Major League Baseball team, fielding positions, and salaries Sort the players into two groups, all pitchers
Refer to the Baseball 2019 data, which report information on the 30 Major League Baseball teams for the 2019 season.At the .10 significance level, is there a difference in the variation in team
The following hypotheses are givenA random sample of 15 paired observations has a correlation of −.46. Can we conclude that the correlation in the population is less than zero? Use the .05
What is the critical F-value when the sample size for the numerator is six and the sample size for the denominator is four? Use a two-tailed test and the .10 significance level.
What is the critical F-value when the sample size for the numerator is four and the sample size for the denominator is seven? Use a one-tailed test and the .01 significance level.
Bloomberg Intelligence listed 50 companies to watch in 2019 (www.bloomberg.com/features/companies-to-watch-2019). Twelve of the companies are listed here with their total assets and 12-month salesLet
The use of cellular phones in automobiles has increased dramatically in the last few years. Of concern to traffic experts, as well as manufacturers of cellular phones, is the effect on accident
The null hypothesis and the alternate hypothesis are:H0 : The frequencies are equal.H1 : The frequencies are not equal.Category........................ fo
Latest statistics show that 34 million people took a cruise in 2019, spending more than $60 billion. One of the most profitable parts of a cruise for the cruise companies is shore excursions.
Refer to the Baseball 2019 data, which report information on the 30 Major League Baseball teams for the 2019 season. Set up a variable that divides the teams into two groups, those that had a winning
The null hypothesis and the alternate hypothesis are:H0: The frequencies are equal.H1: The frequencies are not equal.Category .......................foA........................................10B
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 54 Super Bowl games, the coin toss
Banner Mattress and Furniture Company wishes to study the number of credit applications received per day for the last 300 days. The sample information is reported here.Number of
Following are the financial statements for the Chenhai Manufacturing Corporation for 2018 and 2019. The venture is in financial distress and hopes to turn around its financial performance in the
Go to the Web site for The Wall Street Journal or some other financial publication such as Inc. magazine and identify a venture that has recently filed for reorganization or liquidation with the U.S.
Benito Gonzalez founded and grew the BioSystems Manufacturing Corporation over a several-year period. However, Benito has decided to harvest or exit BioSystems now at the end of 2019 with the
Determine several “resources” available from the Small Business Administration (SBA) for entrepreneurs that might be useful in starting, financing, and managing an entrepreneurial venture. The
The Datametrix Corporation has been in operation for one full year (2019). Financial statements are shown below. Sales are expected to grow at a 30 percent annual rate for each of the next three
Using a Web search, find an industry report for an industry of your choosing. What are that industry’s expected nearterm and longer-term growth rates?
Gamma Systems Manufacturing Corporation has reached its maturity stage, and its net sales are expected to grow at a 6 percent compound rate for the foreseeable future. Management believes that, as a
Web-surfing exercise: Search the Web for a direct offering of a convertible preferred security. Possible search words include “direct public offering” or “small corporate offering
Get a current price for a traded call option on a publicly traded security having publicly traded options (e.g., http:// www.cboe.com). Compare the option price to the value of exercise (stock price
New information for Gamma Systems Manufacturing Corporation has been brought to management’s attention. Use the financial statement information in Problem 5 and take into consideration that sales
How do (a) American-style options, (b) European-style options, and (c) Bermudan-style options differ?
What is investment banking? What is an underwriting spread?
What is meant by investment banking due diligence? How does a traditional registration differ from a shelf registration?
From the Headlines—Boom Supersonic: Comment on Boom Supersonic’s potential to eventual provide liquidity to its investors through an IPO or a sale. Which one seems more likely to you? Why?

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