BUSI 230 HW 1.1, HW 1.2, HW 2.1, HW 2.2, HW 2.3 Connect Exercises Week 1 solutions complete answers

BUSI 230 HW 1.1, HW 1.2, HW 2.1, HW 2.2, HW 2.3 Connect Exercises Week 1 solutions complete answers

HW 1.1 Sampling Assignment 

 

Select the appropriate word or phrase to complete each sentence.

 

A  is a subset of a  containing the individuals that are actually observed.

 

A  sample is a type of sample that is analogous to a lottery.

 

A sample that is not drawn by a well-defined random method is called a  sample.

 

A  sample is one in which the population is divided into groups and a random sample of groups is drawn.

 

A  sample is one in which the population is divided into groups and a random sample is drawn from each group.

 

Determine whether the number described is a statistic or a parameter.

 

The average age of the employees in a certain company is  years.

 

Of the students enrolled in a certain college,  are full-time.

 

In a survey of  high-school students,  of them said that they intended to go to college.

 

Identify the kind of sample that is described.

 

In a large retail company, all employees of  randomly selected stores were asked for their opinion about new employee benefits.

 

In a large retail company, all store managers ask all employees currently working to give their opinions about new employee benefits.

 

The student government association at a certain college draws a random sample of  freshmen, a random sample of  sophomores, a random sample of  juniors, and a random sample of  seniors to ask their opinion about a new grading policy.

 

A salary committee for a Midwestern college receives the list of employees ranked by employee number and then selects every  employee to be asked about the proposed benefit package.

 

A student artist puts the names of all her pieces in a hat and draws out  names for her gallery showing.

 

Liberty University BUSI 230 HW 1.2 Types of Data Assignment complete solutions answers and more!

 

Select the appropriate word or phrase to complete each sentence.

 

The characteristics of individuals about which we collect information are called .

 

Variables that classify individuals into categories are called .

 

The characteristics of individuals about which we collect information are called .

 

Qualitative variables can be divided into two types: .

 

A (An)  variable is a quantitative variable whose possible values can be listed.

 

variables can take on any value in some interval.

 

Determine whether the data described are qualitative or quantitative.

 

Different types of grapes used to make wine.

 

Academic departments at a university.

 

Credit hours taken at a local community college.

 

Reasons for dropping out of college.

 

The maximum speed limit on interstate highways.

 

The number of students in an English class.

 

Determine whether the data described are nominal or ordinal.

 

In my coffee I like cream, sugar, honey, and cinnamon.

 

The hotel rooms available are ocean view, mountain view, and poolside.

 

I got an A in statistics, a B in biology, and C's in history and English.

 

My grades this semester were C, D, A, and B.

 

The competitions at a company picnic include three-legged race, wiffle ball, egg toss, sack race, and pie eating contest.

 

A car rental company has compact, mid-size, and full–size cars available.

 

Determine whether the data described are discrete or continuous.

 

The number of students who visit the library each day.

 

The number of items purchased in a store.

 

The amount of solar power to run landscaping lights.

 

The volume of gas to fill up your tank.

 

The number of tickets sold for a movie premiere.

 

The number of times you login to your email account each day.

 

Determine whether the data described are at the interval level or the ratio level.

 

The number of classes a person is taking.

 

The data represent the  level of measurement.

 

A city's average temperature.

 

The record highest temperature in your hometown.

 

The price of a pair of shoes.

 

The sales price of a car.

 

The year of the next presidential election.

 

The number of people who went to a certain movie.

 

The time that your first class starts.

 

The year a student graduated from high school.

 

The following table provides information about top YouTube channels.

 

Which of the columns represent qualitative or quantitative variables?

 

The column Subscribers (millions) represents  variables.

 

The column Language represents  variables.

 

The column Category represents  variables.

 

Which of the columns represent nominal or ordinal variables?

 

The variable Subscribers (millions) is .

 

The variable Language is .

 

The variable Category is .

 

The following table provides information about the top few grossing movies of all time.

 

Which of the columns represent qualitative or quantitative variables?

 

The column Movie Title represents  variables.

 

The column Release Year represents  variables.

 

The column Studio represents  variables.

 

The column Ticket Sales (millions of ) represents  variables.

 

The column Running Time (minutes) represents  variables.

 

Which of the columns represent nominal or ordinal variables?

 

The variable Movie Title is .

 

The variable Release Year is .

 

The variable Studio is .

 

The variable Ticket Sales (millions of ) is .

 

The variable Running Time (minutes) is .

 

The following table provides information about the top selling books of all time.

 

The column Book represents  variables.

 

The column Author(s) represents  variables.

 

The column Language represents  variables.

 

The column Year Published represents  variables.

 

The column Sales represents  variables.

 

The column Genre represents  variables.

 

Which of the columns represent nominal or ordinal variables?

 

The variable Book is .

 

The variable Author(s) is .

 

The variable Language is .

 

The variable Year Published is .

 

The variable Sales is .

 

The variable Genre is .

 

Liberty University BUSI 230 HW 2.1 Graphical Summaries for Qualitative Data Assignment complete solutions answers and more!

 

Select the appropriate word or phrase to complete each sentence.

 

In a data set, the number of items that are in a particular category is called the .

 

In a data set, the proportion of items that are in a particular category is called the .

 

A  is a bar graph in which the bars are ordered by size.

 

A  is represented by a circle in which the sizes of the sectors match the relative frequencies of the categories.

 

The following bar graph presents the average amount a U.S. family spent, in dollars, on various food categories in a recent year.

 

On which food category was the most money spent?

 

True or false: On the average, families spent more on dairy products than on cereals and bakery products.

 

True or false: On the average, families spent less on cereals and bakery products than on dairy products.

 

True or false: On the average, families spent more on dairy products than on cereals and bakery products.

 

Following is a pie chart that presents the percentages of video games sold in each of four rating categories.

 

(a) Construct a relative frequency bar graph for the data. Round your answers to two decimal places.

 

(b) In which rating category are the most games sold?

 

(b) In which rating category are the least games sold?

 

(c) True or false: More than twice as many E-rated games are sold as M-rated games.

 

(c) True or false: More than twice as many E10-rated games are sold as T-rated games.

 

(c) True or false: More than twice as many E-rated games are sold as T-rated games.

 

(d) True or false: Greater than one in three games sold is a T-rated game.

 

(d) True or false: Fewer than one in five games sold is an M-rated game.

 

(d) True or false: Fewer than one in five games sold is a T-rated game.

 

The following side-by-side bar graph presents the percentages of the sources of funds for food expenditures in the given years.

 

Which sources of funds for food expenditures increased or decreased as a proportion of the total in the given years?

 

In , the smallest source of funds for food expenditures was Governments. Is this the smallest source of funds in ?

 

In , the largest source of funds for food expenditures was Families and individuals. Is this the largest source of funds in ?

 

Popular video games: The following frequency distribution presents the number of copies sold for each of the seven best-selling video games.

 

Popular video games: The following frequency distribution presents the numbers of copies sold for each of the seven best-selling video games.

 

(a) Construct a relative frequency distribution. Round your answers to three decimal places.

 

(b) Construct a relative frequency bar graph.

 

Popular video games: The following frequency distribution presents the numbers of copies sold for each of the six best-selling video games.

 

Popular video games: The following frequency distribution presents the numbers of copies sold for each of the eight best-selling video games.

 

Hospital admissions: The following frequency distribution presents the five most frequent reasons for hospital admissions in U.S. community hospitals in a recent year.

 

(b)The categories coronary atherosclerosis, congestive heart failure, and heart attack refer to diseases of the circulatory system. True or false: There were more hospital admissions for infant birth than for diseases of the circulatory system.

 

(b)The categories coronary atherosclerosis, congestive heart failure, and heart attack refer to diseases of the circulatory system. True or false: There were less hospital admissions for infant birth than for diseases of the circulatory system.

 

Hospital admissions: The following frequency distribution presents the five most frequent reasons for hospital admissions in U.S. community hospitals in a recent year.

 

(a) Construct a relative frequency distribution. Round the answers to two decimal places.

 

(b) Construct a relative frequency bar graph.

 

(c) Construct a pie chart.

 

Liberty University BUSI 230 HW 2.2 Freqeuncy Distributions and Their Graphs Assignment complete solutions answers and more!

 

Select the appropriate word or phrase to complete each sentence.

 

When the right half of a histogram is a mirror image of the left half, the histogram is .

 

A histogram is skewed to the  if its left tail is longer than its right tail.

 

A histogram is  if it has two clearly distinct modes.

 

The  of a category is the number of times it appears in the data set.

 

Classify the histogram as skewed to the left, skewed to the right, bell-shaped, or approximately uniform.

 

Classify the histogram as unimodal or bimodal.

 

Movies: A sample of people were asked how many movies they had seen in a movie theater during the past month. Following is a frequency histogram of their responses.

 

(a)What is the most frequent number of movies seen?

 

The most frequent number of movies seen is .

 

There were  people in the sample.

 

The number of people who saw no fewer than three movies is .

 

Approximately  saw fewer than three movies. Round your answer to the nearest whole number.

 

The following frequency histogram presents the final grades of a random sample of 100 college students.

 

(a) How many classes are there?

 

(b) What is the class width?

 

(c) Which class has the highest frequency?

 

(d) What percentage of students got a final grade higher than 70?

 

The following histogram shows the distribution of systolic blood pressure (in millimeters) for a sample of women. Use the histogram to answer the following questions.

 

The percentage of women with blood pressures above 130 is closest to .

 

In which interval are there more women: 130-135 or 140-150?

 

BMW prices: The following table presents the manufacturer's suggested retail price (in $1000s) for base models and styles of BMW automobiles.

 

(a) Construct a frequency distribution using a class width of 15, and using 30.0 as the lower class limit for the first class.

 

(b) Construct a frequency histogram from the frequency distribution in part (a).

 

(c) Is the histogram unimodal or bimodal?

 

Geysers: The geyser Old Faithful in Yellowstone National Park alternates periods of eruption, which typically last from 1.5 to 4 minutes, with periods of dormancy, which are considerably longer. The following table presents the durations, in minutes, of 30 dormancy periods that occurred during a recent year.

 

(a) Construct a frequency distribution using a class width of 7, and using 55 as the lower class limit for the first class.

 

(b) Construct a frequency histogram from the frequency distribution in part (a).

 

(c) Is the histogram skewed to the left, to the right, or approximately symmetric?

 

The following frequency distribution presents the batting averages of professional baseball players who had 300 or more plate appearances during the 2012 season.

 

(a) Find the midpoints for the classes. Round the answers to three decimal places.

 

Construct a frequency polygon for the frequency distribution.

 

Frequency polygon: The following frequency distribution presents the number of murders (including negligent manslaughter) per 100,000 population for each U.S. city with population over 250,000 in a recent year.

 

(a) Find the midpoints for the classes.

 

(b) Construct a frequency polygon for the frequency distribution.

 

Ogive: The following frequency distribution presents the batting averages of Major League Baseball players who had 300 or more plate appearances during a recent season.

 

The following frequency distribution presents the number of murders (including negligent manslaughter) per 100,000 population for each U.S. city with population over 250,000 in a certain year.

 

Liberty University BUSI 230 HW 2.3 More Graphs for Quantitative Data Assignment complete solutions answers and more!

 

Select the appropriate word or phrase to complete each sentence.

 

In a stem-and-leaf plot, the rightmost digit of each data value is the .

 

In a back-to-back stem-and-leaf plot, each of the two data sets plotted must have the same .

 

is useful when the data consist of values measured at different points in time.

 

How's the weather? The following table presents the daily high temperatures for the city of Macon, Georgia, in degrees Farenheit, for the winter months of January and February in a recent year.

 

Construct a stem-and-leaf plot, using the digits 4, 5, 6, and 7 as the stems. Do not separate the answers with a comma. If there are no leaves, select the "None" button.

 

Tennis and golf: Following are the ages of the winners of the men's Wimbledon tennis championship and the Master's golf championship for selected years.

 

(a) Construct back-to-back split stem-and-leaf plots for these data sets, in which each stem appears twice, once for leaves - and again for leaves -. Do not separate the answers with commas. If there are no leaves on a particular stem, select the "None" button.

 

(b) How do the ages of Wimbledon champions differ from the ages of Master's champions?

 

More weather: The following table presents the daily high temperatures for the city of Macon, Georgia, in degrees Fahrenheit, for the winter months of January and February in a recent year.

 

(a) Construct a dotplot for these data.

 

(b) Are there any gaps in the data?

 

Safety first: Following are the numbers of hospitals in each of the  U.S. states plus the District of Columbia that won Patient Safety Excellence Awards.

 

(a) Construct a dotplot for these data.

 

(b) Describe the shape of the dotplot.

 

Looking for a job: The following table presents a country's unemployment rate for each of the years  through .

 

(a) Construct a time-series plot of the unemployment rate.

 

(b) For which periods of time was the unemployment rate increasing? For which periods was it decreasing?

 

Arctic ice sheet: The following time-series plot presents the extent of ice coverage (in millions of square kilometers) in the Arctic region in September of each year from  through .

 

(a) What was the first year that the coverage dropped below 5 million square kilometers?

 

(b) What was the first year that the coverage dropped below 4 million square kilometers?